Amu Hinamori
Amu Hinamori (日奈森 あむ, Hinamori Amu?), the series' protagonist, is a student of Seiyo Elementary. Amu's classmates see her as "cool and spicy", but Amu is actually extremely shy and timid. Part of the reason for this misunderstanding is the trendy punk goth clothing her mother buys for her as well as the way in which she expresses her shyness and avoids doing new things which people interpret as 'cool'. However, when Amu wishes for the courage to be reborn as her would-be self, three colorful eggs appear the next morning, which hatch into Amu's three Guardian Characters: Ran, Miki, and Su. When one of her Guardian Characters Character Changes with her, she gets embarrassed because they make her speak in ways that she thinks are "totally out of character".
Because of her three Guardian Characters, Amu became a member of the Guardians, the school's student council, although she refused to join at first. Amu's position with the Guardians is the Joker. Her task, as the Joker, is to search for and purify X Eggs, X Characters, and in the second season, Mystery Eggs, the corrupted forms of people's would-be selves. Ran, Miki, and Su help Amu with her task through a process called a Character Transformation, which is enabled by the Humpty Lock and grants Amu special abilities depending on the Guardian Character. Later on, Amu also creates a fourth egg, known as Diamond. In the second season, when Amu shows her true potential, the Humpty Lock increases in power. Thus, new transformation scenes are used.
Amu's two main love interests are Tadase Hotori and Ikuto Tsukiyomi. However, she has minor crushes, such as Kairi Sanjo, Kukai Souma, and Nagihiko Fujisaki, but shows more friendliness. Amu's primary rival is Utau Hoshina, an idol singer for Easter who is jealous that Ikuto shows an interest in Amu instead of her. Amu gains the Dumpty Key from Yoru and uses it to unlock the Humpty Lock.
In the latest chapters, when Amu opens the Humpty Lock with the Dumpty Key, she and Tadase see more of Ikuto's past (their transportation being bubbles). Their journey ends when Amu Character Transforms with Diamond, and she and Ikuto fight briefly. Ran, Miki, Su, and Diamond all combine their powers, making Amu Character Transform into Amulet Fortune and Ikuto Character Transform into Seven Seas Treasure.

Ran (ラン?)
Ran is the first to hatch from Amu's eggs and represents Amu's desire to be more honest, confident and athletic. Ran is frequently cheering Amu on. During Character Change, Amu gains increased athletic abilities. During Character Transformation, Amu becomes Amulet Heart. Recently, in Chapter 38, Ran undergoes a new Character Transformation, along with Miki, Su, and Diamond; becoming Amulet Fortune.

Miki (ミキ?)
The second Guardian Character to hatch is Miki. Miki represents Amu's desire to be more sharp, level headed, and artistic. Miki is also the one to help Amu make fashion choices. Reflecting Amu's love interests, Miki has shown an interest in Tadase's Guardian Character, Kiseki, Ikuto's Guardian Character, Yoru, Kukai's Guardian Character, Daichi, and Kairi's Guardian Character, Musashi. During Character Change, Amu gains increased artistic abilities. During Character Transformation, Amu becomes Amulet Spade. Recently, in Chapter 38, Miki undergoes a new Character Transformation, along with Ran, Su, and Diamond; becoming Amulet Fortune. In Shugo Chara! Doki, Miki is the only one out of Amu's Guardian Characters to be able to sense Mystery Eggs clearly.

Su (スゥ, Sū?)
The third Guardian Character, Su, represents Amu's desire to be more caring, sensitive and improve her domestic skills. However, Su is prone to silly mistakes. She is very fond of Amu's teacher, Yuu Nikaidou, after helping Nikaidou realize that he was a good person and can still pursue his own dreams. Amu gains an improvement in cooking and sewing skills during Character Change, as well as becoming "too girly". During Character Transformation, Amu becomes the Amulet Clover. Recently, in Chapter 38, Su undergoes a new Character Transformation, with Ran, Miki, and Diamond; becoming Amulet Fortune.

Diamond (ダイヤ, Daiya?)
Diamond is Amu's fourth Guardian Character. Diamond represents Amu's desire to shine and be noticed in front of other people . She becomes an X Egg when Amu dislikes all the changes that were happening in the spring. While collecting X-eggs with Yukari, Utau finds Diamond's egg inside the box. She soon hatches into a X-character. Unusually, she is not shaped like the usual X-character; she looks like a normal Guardian Character, but with a white X-shaped clip covering her black diamond-shaped clip. Because of this, Amu doesn't know Diamond's true name. In the Japanese versions, Diamond's name is shortened to Dia. X-Diamond can Character Transform with Utau, becoming Dark Jewel, however, the transformation does not last very long. When Amu is finally able to prove to Diamond that she does have enough confidence to shine she reverts into her true original form. Together they undergo a Character Transformation, becoming Amulet Diamond. Afterward, Diamond returns to her egg until she sees that Amu "shines again", but secretly comes out as a spirit at times. Recently, in Chapter 38, Diamond comes back when Amu "shines". After character transforming and fighting with Ikuto, she, Ran, Miki, and Su combine powers with Amu; becoming Amulet Fortune.

Tadase Hotori
Tadase Hotori (辺里 唯世, Hotori Tadase?) is a boy in the same year as Amu and serves as King's Chair of the Guardians. Like Amu, he is actually a shy person and is not good at public speaking; instead, he Character Changes with his Guardian Character, Kiseki. Although he is popular with the girls, when a girl confesses their love to Tadase, he will have Kiseki reject her. However, whenever he hears the word "ouji" ("prince"), or anything resembling the word "ouji", he Character Changes into an egotistical king who seeks world domination. Amu develops a crush on Tadase soon after she transfers into the school. His love interest is Amulet Heart, Amu's Character Transformation with Ran, but it later becomes Amu herself. In episode 39, Kiseki's egg turns into an X-egg because Tadase lost his self esteem by not being able to find the Embryo. With the help of Amulet Heart, Tadase turns back to normal. Tadase has known Ikuto and Utau since childhood, but he does not talk about it in detail until the Guardians are about to face Utau in their final battle. Amu and Tadase reconcile soon after, though. Later on, he agrees to help Amu save Ikuto from Easter. Tadase confesses his love for Amu in chapter 28 (episode 74 in the anime) while Ikuto was hiding in Amu's closet. Ikuto over heard and made fun of Tadase, only to protect him, which he knew nothing about. When Tadase was facing against Ikuto in chapter 35, his staff becomes a sword called Royal Sword.

Kiseki (キセキ?)
Kiseki is Tadase's Guardian Character. Kiseki was born for a combination of Tadase's desire to be stronger and the dream of world domination. Because of this, Kiseki is extremely egotistical and often demanding, and doesn't like obeying others. He frequently calls other Guardian Characters to go on "Special Secret Meetings." A running gag is that the other Guardian Characters will ignore him sometimes. Kiseki is aware of Tadase's crush on Amu and acts the same way as Amu's Guardian Characters whenever Tadase seems to be confessing to Amu. Kiseki holds a grudge against Ikuto's Guardian Character, Yoru. During Character Change, Tadase gains the confidence to overcome his shyness. However, sometimes Tadase will become an egotistical person who seeks world domination. Although Tadase could not Character Transform with Kiseki at first, they later gain this ability with the help of Amu after Kiseki's egg gets tainted with an X, becoming Platinum Royale.

Ikuto Tsukiyomi
Ikuto Tsukiyomi (月詠 イクト, Tsukiyomi Ikuto?) is a teenage boy contracted by Easter to find the Embryo. He often helps Amu even though he works for Easter. Ikuto actually despises Easter and tries to wrench himself free from them by trying to find the Embryo to grant his own wish. He possesses the Dumpty Key which pairs with Amu's Humpty Lock which at first did not fit in the keyhole. Like his father, Ikuto is a skilled violinist. The Dumpty Key used to belong to him, but the Dumpty Key is believed to belong to Tadase's father, but it actually belongs to Aruto, Ikuto's father. His mother, upon marrying someone else after they found her husband's violin in a foreign country and believing that he would not come back, bound her children into working for Easter. Ikuto's personality is aloof, stoic, and a little naughty. He likes teasing people, especially Amu and Tadase. He is also the older brother of Utau Hoshina. As the series goes on, he grows very strong feelings for Amu — he confessed that he loves her in the same chapter Tadase did, although she believes that he is teasing her. He later surrendered himself to Easter, not wanting to get anyone else involved in the mess he made. In the manga timeline, it is shown he Character Transformed with a new black Guardian Egg to become Death Rebel, shocking Amu. In chapter 37, Tsukasa told Ikuto he resembles his father when he yells. In chapter 38, he Character Transforms with Yoru and the black egg into Seven Seas Treasure. In chapter 39, it's said that Ikuto may have two eggs, one is possibly still inside him. In the latest chapter, Ikuto calls Amu 'princess' and she replies by asking him to thank her for making him get back to normal. Ikuto swears that this time he will be the one to protect her, along with Tadase.

Yoru (ヨル?)
Yoru is Ikuto's cat-like Guardian Character and represents Ikuto's desire to be free. Yoru often goes out by himself and enjoys causing trouble for the Guardians and their Guardian Characters for fun. When Ikuto and Yoru undergo a Character Transformation, they become Black Lynx. Yoru is hysterical when Ikuto does the Death Rebel Character Transformation in chapter 31. Lately, he also can't track Ikuto, because the hypnotizing fork confuses him. Later on, when Amu and Tadase find Ikuto being controlled by Easter, Yoru takes the Dumpty Key and gives it to Amu. In chapter 38, he along with the black egg, combine powers with Ikuto to become Seven Seas Treasure.

Utau Hoshina
Utau Hoshina (ほしな 歌唄, Hoshina Utau?) is a junior high student model turned singing idol. She is actually Ikuto's younger sister, Utau Tsukiyomi (月詠 歌唄, Tsukiyomi Utau?). Utau had tried to find the Embryo to release her brother from Easter, but she never succeeded. Utau is very attracted to Ikuto and becomes extremely jealous of Amu because Ikuto shows an interest teasing her. She kissed him in episode 29. However, she eventually accepts Amu.
She was the vocalist of the indie band "Black Diamond" which is produced by her manager, Yukari Sanjo, as a method of using the CDs of their music to draw the eggs out of children and make them into X Eggs. When the plan fell apart, Utau quit Easter with her manager and became a singer on her own, without Easter contracting her.

Il (イル, Iru?)
The devilish Il is the first of Utau's two Character Guardians introduced in the story. Il seems mean and unkind, but it's just her character. Sometimes she can be helpful and sincere, but she dislikes nagging. She represents Utau's energetic and playful side. During Character Transformation, Utau becomes Lunatic Charm, with the attack Nightmare Lorelei and later, Dream Trident. When Il felt lonely because El wasn't there for her to tease and when she felt that Utau was ignoring her because of Diamond, she Character Transforms with Amu, becoming Amulet Devil.

El (エル, Eru?)
El is Utau's second Guardian Character and is the complete angelic opposite of Il. El often nags, likes correcting people about their choices that she considers wrong herself, and helps those who are troubled by love. Because El was treated badly by Il and ignored by Utau, she left home and wound up in Amu's care. El can perform a Character Transformation with Amu, resulting in Amulet Angel, which surprised Utau. However, as Amu is not El's real owner, the Character Transformation remains powerless with no real abilities. Whenever El performs a Character Transformation with Amu, Amu usually ends up being embarrassed due to El's over-the-top antics. El finally performed a Character Transformation with Utau, forming Seraphic Charm. Later in the manga series, Utau uses an new attack with El called White Wing to help the Guardians help Ikuto.

Supporting characters

Nadeshiko Fujisaki (藤咲 なでしこ, Fujisaki Nadeshiko?) / Nagihiko Fujisaki (藤咲 なぎひこ,
Fujisaki Nagihiko?)
Nadeshiko Fujisaki is a student in the same year as Amu and serves as Queen's Chair of the Guardians. When Amu rejected the offer to join the Guardians, Nadeshiko tries several tactics to convince Amu to join. The two become best friends and Nadeshiko looks over and supports Amu in her love life. However, before Amu and Nadeshiko enter the sixth grade, Nadeshiko leaves Seiyo Elementary for Europe to study dancing.
Nadeshiko is actually a boy named Nagihiko Fujisaki, called "Nagi" as a nickname by Amu and the girls. It is tradition in the Fujisaki family for males to be raised as females as part of their training so that they may play female roles in Japanese dance. Nagihiko's secret is known by his family, Kukai, Tadase, the school's principal Tsukasa Amakawa, and as of chapter 34, Rima. After Kairi leaves the Guardians, Nagihiko returns and is appointed as the interim Jack's Chair.

Temari (てまり?)
Temari is Nagihiko's first Guardian Character. Temari appears to be elegant and Nagihiko's desire to be more mannered and become a Japanese dancer. However, during Character Change, both Temari and Nagihiko (as Nadeshiko) become aggressive and very masculine; Nagihiko, inadvertantly, also gains a naginata, which he promptly uses. Prior to Nagihiko's return to the guardians, Temari went back into her egg to slumber. In chapter 34, Temari wakes up after Nagihiko realizes that it doesn't matter what gender a person is, it's effort that they put into something they do. They perform a Character Transformation: Yamato Maihime.

Rhythm (リズム, Rizumu?)
Rhythm is Nagihiko's second Guardian Character. Rhythm appears to be cool and outgoing, showing Nagihiko's boy self. Rhythm's egg was first seen in chapter 30 and in episode 56, but as of chapter 34, he hatches after Nagihiko remembers how much he liked playing basketball, at his own pace and rhythm, while fighting against a X Character. When in a Character Transformation, they become Beat Jumper.

Kukai Soma (相馬 空海, Sōma Kūkai?)
Kukai Soma is the upbeat and energetic Jack's Chair of the Guardians. One year senior to Amu, Kukai helps Amu with her training as the Joker. Although he was the captain of the soccer club, Kukai loves and excels at all sports. At the end of the school year, Kukai graduates and goes on to middle school. However, Kukai returns to visit the Guardians from time to time.

Daichi (ダイチ?)
Kukai's Guardian Character is Daichi. He is very good at sports and cannot seem to sit still. He was born when Kukai wanted to do many sports but had to choose. When Daichi and Kukai Character Change, Kukai becomes even more athletic. When Kukai and Daichi return for a visit, they Character Transform with the power of the Humpty Lock, becoming Sky Jack.

Yaya Yuiki (結木 やや, Yuiki Yaya?)
Yaya Yuiki is the childish girl serving as the Ace Chair and is one year junior to Amu. Yaya often acts immature for her age, such as having an enormous sweet tooth, a great soft spot for items like ribbons, as well as tending to be hyperactive. She is also a ballerina, though a rather clumsy one. She has a newborn baby brother named Tsubasa, who, she claims, gets all her parents' attention. It is because of this that her baby-like Guardian Character, Pepe, was born. Though she acts jealous around Tsubasa, Yaya does have a responsible side, once personally taking him to the doctor when he had a fever, as no other option was possible.

Pepe (ぺぺ?)
Pepe is a baby-like Guardian Character who was born from Yaya's desire to remain baby-like in nature. When either she or Yaya get hurt or something goes wrong, both of them will begin to whine and cry in unison. During Character Transformation, they become Dear Baby.

Rima Mashiro (真城 りま, Mashiro Rima?)
Rima Mashiro replaces Nadeshiko as the new Queen's Chair. Although Rima is the same age as Amu, she is extremely petite and has relatively poor athletic ability. Most of the boys in her class admire her because of her beauty and passive personality, while the girls are annoyed by her because of her selfishness.
Because of a kidnapping incident that happened before she transferred to Seiyo Elementary, her parents pick her up after school, but since it interferes with their work schedules, they often argue about who cares more for Rima over work, resulting in Rima often having no one but Kusukusu as company for her secret interest in gag comedy. Later, she opens up to Amu and becomes friends with her.
When Yaya explains to Rima about Amu and Nadeshiko's friendship, she is shown to be jealous. At first, she is shown to have great dislike for Nagihiko because Amu told Rima and Yaya that he is Nadeshiko's twin brother due to a confusion between the two. That leads Rima to be protective over Amu. She tells Nagihiko that he is useless because his Guardian Character is still inside an egg, but gains respect for him later on.

Kusukusu (クスクス?)
Kusukusu is Rima's Guardian Character and represents Rima's desire to make others laugh. When she Character Changes, Rima becomes a gag character (which she is embarrassed to use) and uses a signature phrase and pose: "Bala-Balance" (Balancing Balance) from the magazine Great Gag Manga King (ギャグマンガ大王, Gyagu Manga Daiō?). During Character Transformation, Rima becomes Clown Drop.

Kairi Sanjo (三条 海里, Sanjō Kairi?)
Kairi Sanjo replaces Kukai as the new Jack's Chair when Kukai leaves for middle school. Kairi is tall, despite being two years junior to Amu. Unlike the spontaneous Kukai, Kairi is uptight, very organized, and blunt about faults. Even with these traits, he is so capable that Amu and Yaya call him "class president."
Kairi is the younger brother of Yukari Sanjo and was sent to spy on the Guardians. This wasn't his choice though, as Yukari immediately begged him to transfer to Seiyo upon discovering that he had a Guardian Character. Since his sister is busy at work, Kairi takes care of the household work (and his sister) in her apartment. However, when he saw the true meaning of his "missions," he tries to rebel against Yukari, but not before he reveals his secret to the Guardians when they accidentally discover him with Pestering CDs. He switches sides after Amu convinces him he is a good person. Afterward, he leaves saying that he promised his parents and local classmates that he would return, but not before declaring his love for Amu, saying that he shall return for her when he has become a man. He also declared a rivalry toward Tadase.

Musashi (ムサシ?)
Kairi's Guardian Character. Musashi has traits and the personality of that of a samurai. He also has some of Kairi's traits, such as green hair and glasses. When he Character Transforms with Kairi, they become Samurai Soul.

Yuu Nikaidou (二階堂 悠, Nikaidō Yū?)
Yuu Nikaidou is a former employee member of Easter. In order to find the Embryo, he joined Seiyo Elementary and became in charge of Amu's class in the disguise of a ditzy but kind-hearted teacher. His childhood dream was to become a robot engineer, but when his mentor quit, due to his ailing wife, and his parents opposed the idea, he lost sight of his dream and became a twisted person. He recovered with help from Amu and Su. He resigned from Easter Company and officially become the teacher in charge of Amu's class. A running joke is that he calls Amu Himamori, meaning "leisure time". He dated Yukari Sanjo before the series began, and they broke up.

Yukari Sanjo (三条 ゆかり, Sanjō Yukari?)
Yukari Sanjo is a former employee of Easter Company, Kairi Sanjo's older sister, and Utau's manager. She came up with a new project, Black Diamond, to find the Embryo and mass-produce X Eggs. The CDs of the band were freely distributed and the people listening to it had their Eggs removed by force. As the band became more famous, their song is slated to be released to the Internet together with the unveiling of the band.
She and Utau resigned from Easter after Amu got Diamond back, and started their own music industry called Sanjo Productions. Yukari once dated Yuu Nikaidou, but the two have since broken up. She gets annoyed whenever their relation is mentioned.

Lulu De Morcerf (ルル·ド·モルセール, Ruru Do Morusēru?)
Lulu De Morcerf is an anime-original character in Shugo Chara!! Doki—. She is the new Easter Company worker who can turn Heart's Eggs into Mystery Eggs using a ruby necklace. Her mother is an actress and her father is a French chef. She wants to find the Embryo so her mother will regain her radiance and make acting history. At first, Lulu dislikes Amu for always purifying the people with Mystery Eggs and stopping the Embryo from appearing. However, in episode 63 of Shugo Chara!! Doki—, Lulu becomes quite kinder to Amu. As of episode 84, Lulu has been fired from Easter.

Nana (ナナ?)
Nana is an anime-original character in Shugo Chara!! Doki—. Her specialty is making jewelry. During Character Change, Lulu's hair clip becomes a purple flower. This allows Lulu to use her necklace to corrupt Heart's Eggs. Unlike Lulu's heritage, Nana has a nagoya accent which results with Lulu sometimes speaking in the same dialect, which embarrasses her greatly. When Lulu used the accent in front of Amu, she complimented it by being cute surprising Lulu.

Minor characters

Midori Hinamori (日奈森 緑, Hinamori Midori?)
Midori Hinamori is Amu's mother and works as an editor for the magazine Housewives' Knowledge. Midori is the one responsible for choosing Amu and Ami's clothing styles. Unlike Amu's father, Midori is more understanding of Amu's relationship with boys. In chapter 31 when Amu was found out with Ikuto in the house, she believes her and seeks to find a place for Ikuto. In Chapter 33, Amu calls her, and Midori mysteriously tells Amu that everyone believes in her.

Tsumugu Hinamori (日奈森 紡, Hinamori Tsumugu?)
Tsumugu Hinamori is a wild bird photographer and Amu's father. Tsumugu is devoted to his daughters and refers to them with names like "Papa's little sparrows" and "Papa's shining stars." He is frequently shown taking pictures of Ami. However, he overreacts at the slightest provocation that Amu has a relationship with a boy.

Ami Hinamori (日奈森 亜実, Hinamori Ami?)
Ami Hinamori is Amu's little sister who is innocent and pure-hearted. Ami is able to see Guardian Characters despite the fact that she does not have one. Unlike Amu, Ami is dressed in "Sweet Lolita" clothing. She respects and looks up to both Utau and Amu and loves to sing. She is a huge fan of Utau and played a big role in helping Utau to rediscover her good side.

Tsukasa Amakawa (天河 司, Amakawa Tsukasa?)
Tsukasa Amakawa is the first King's Chair of the Guardians and their founder. He is the Seiyo Elementary superintendent and manages the planetarium as a part-time job. He is the artist of the book "Kokoro no Tamago" (The Heart's Egg). Tsukasa looks similar to Tadase because he is Tadase's uncle on his mother's side. In chapter 32, Tsukasa is seen in a photograph along with the Hotori family and the Tsukiyomi family. So when Ikuto ran away, Tsukasa took him in and apparently "kidnapped" him in Tadase's eyes. At first, he is thought to hold the Humpty Lock. He is a cat lover and has a liking for Ikuto's cat ears, often teasing him with catnip and food. In chapter 37, Tsukasa tells Ikuto 'he is not a grown up man.' Tsukasa also has a cunning ability to guess people's thoughts.

Gozen (御前?)
Gozen is the head of Easter. The people of Easter Company refer to him as "Gozen," although it's revealed that his real name is Hikaru. Gozen promised the company employees a successful career if they can present him the Embryo. According to the manga, he wishes for a rare one-of-a-kind jewel, thus Easter's search for the Embryo. In chapter 40, it is revealed that Gozen is the little boy to whom Amu gave a taiyaki and appeared many other times mysteriously. This little boy, Hikaru, is unique in that he did not have a Heart's Egg in him like almost all children. In Chapter 41, after his past is revealed, he finally gains one.

Kazuomi Hoshina (星名 一臣, Hoshina Kazuomi?)
Kazuomi Hoshina is the managing director of Easter company, a middle-aged man who is also the stepfather of Ikuto and Utau, and the former superior of Nikaidou and Yukari. After his repeated failure to obtain the Embryo, he started fearing that Gozen may abandon him, so he forms a plan to brainwash Ikuto to collect X Eggs. In chapter 33, he realizes that the Embryo only shows up when X Eggs are purified, so he lures the Guardians into a trap. Ikuto refers to him as "Mr. Director."

Nobuko Saeki (冴木 のぶ子, Saeki Nobuko?)
Nobuko Saeki is a spiritual fortune teller and has a praised fortune telling column in Housewives' Knowledge, although she dislikes the occult. She is 54 and likes miso peanuts. Her spiritual sense is so strong that she is able to see the Guardian Characters. She is the one who inspires Amu to wish to be a new person, meaning that she ignited Amu's wishes. In Chapter 33, she appears to help the Guardians into the Easter headquarters, saying that Amu is searching for someone precious to her. She is also fond of Tadase, probably because he looks so much like Tsukasa, who is one of the astrologers in her magazine.

Saaya Yamabuki (山吹 沙綾, Yamabuki Saaya?)
Saaya Yamabuki is an egotistical girl in the same class as Amu and leader of the Tadase Fan Club. Along with the other club members, Saaya shows off whenever she gets the chance in order to impress Tadase, and Kukai, but to no avail. She is also very jealous of Amu.

Seiichiro Suzuki (鈴木 誠一郎, Suzuki Seiichirō?)
Seiichiro Suzuki is a third grade boy who greatly admires Amu. He is often seen cheering for Amu, admiring her in someway, or proving to Saaya Yamabuki that Amu is a superhero or can save anyone from anything.