Utau Hoshina

• Name: Utau Hoshina
• Real name: Utau Tsukiyomi
• Birthday: November 9
• Age: 14 -16
• Blood type: A
• Height: 158cm.
• Weight: 44kg
• Shugo Chara: Eru and Iru
• Character Transformation: Lunatic Charm, Dark Jewel and Seraphic Charm
• Anime: Shugo Chara
  

Utau is a 14-year-old junior high student model turned singing idol. Utau Hoshina is actually only her stage name, since her actual name is Utau Tsukiyomi , and is Ikuto's younger sister. She repeatedly tries to win her brother's affection, and thus becomes extremely agitated when she notices that Ikuto is interested in Hinamori Amu. However, she eventually becomes friends with Amu. Utau was both independent artiste and the vocalist of the indie band "Black Diamond", produced by her manager, Sanjo Yukari , 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 Company with her manager and became a singer on her own, without Easter contracting her.

Yuiki Yaya

• Name: Yaya Yuiki
• Birthday: May 25
• Blood type: O
• Height: 150cm
• Weight: 36kg
• Shugo Chara: Pepe
• Character Transformation: Dear Baby
• Anime: Shugo Chara

Yuiki Yaya is the childish girl serving as the Ace's 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. Yaya wants to be a baby forever so her parents would give her more love then her younger brother. She is also a ballerina, though a good one, but also a rather clumsy one. Yaya's favorite things are cute and babyish.

Hinamori Amu

• Name: Amu Hinamori
• Birthday: September 24
• Blood type: O
• Age: 13-15
• Height: 152cm
• Weight: 58kg
• Shugo Chara:
  

1. Ran
2. Miki
3. Suu
4. Dia

• Character Transformation:

1. Amulet Heart
2. Amulet Spade
3. Amulet Clover
4. Amulet Diamond
5. Amulet Angel
6. Amulet Devil
7. Amulet Fortune

• Anime: Shugo Chara

Amu Hinamori grew up with a tough outside character and everyone in school addresses her as "Cool and Spicy", but deep down she is extremely shy and timid. One of the reasons that she has this image is because her mother dresses her in punk and cool clothing. Since she has a stubborn character, fans call Amu a tsundere, but is properly classified as a kuudere. One night, she became tired of everybody viewing her outside character and made a wish to be someone other than herself. The next morning, she finds three odd looking eggs on her bed. The eggs hatch one after another and give birth to her Guardian Character Ran. Miki and Suu. Later a forth Guardian Character Dia.

When Tadase Hitori, the King's Chair of the Guardian of Seiyo Academy, discovers her eggs, he invites her into their team and give her the title "Joker". Though she doesn't want to join the team at first, she eventually gives in after realizing how serious the situation is. As the person with three Guardian Characters, Amu is given the Humpty Lock with mystical powers and so receives the ability to Character Transform.

Though she does not know her true self very well, she appears to be rather determined when it comes to helping others. But as Dia indicates, she needs to know herself better in order to be able to do any good at all.

In the second season of the anime, she begins to develop her own character and so increases her own powers. The most direct example of this is the new items & skills of the three Amulet character transformations. Also, though she can't see it very well, those around her notice that she has changed.

Kukai Souma

• Name: Kukai Souma
• Birthday: August 17th
• Age: 12-14
• Blood type: A
• Height: 162cm
• Weight: 49kg
• Character Transformation: Sky Jack
• Shugo Chara: Daichi
• Anime: Shugo Chara
  

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 now and then to assist them. As a sporty kid, he has an outgoing personality, and also a sense of justice. He is very competitive and sometimes competes with Amu and Nadeshiko.He would visit the Guardians sometimes and help out in battle.Kukai has a grandfather living in a temple on the mountains. In a much later time, he is revealed to have four older brothers named Kaidou, Shuusui, Unkai and Rento.Kaidou is always pushy and harsh to him, but that turns out to be their way of communicating and playing. As Sky Jack, he wears the green outfit of a pilot with pilot goggles with a star on his left of the pilot headband. He also wears black boots.