Age: 5th Grade School: Seiyo Academy Elementary Family: Father (Photographer), Mother (Fashion Columnist), Younger sister Ami Due to her cool and detached outward appearance, she is nicknamed "Cool and Spicy" by her peers. In reality, she is shy and loves cute things, but she is afraid of showing her true personality. Guardian Characters Ran: Energetic and proactive Miki: Cool and artistically gifted Su: Gentle and skilled in housework/cooking Dia: Symbolizes the "shining, true Amu"—appears and disappears throughout her growth She holds the role of "Joker" in Seiyo Academy's special organization, the "Guardians." The Joker is responsible for purifying X Eggs.

Age: 10th Grade (High School 1st Year) Skilled at the violin and associated with Easter (Dark Jewels). He likes Amu and possesses a tsundere-like charm. Guardian Character: Yoru—a mischievous cat personality.

Age: 5th Grade Amu's classmate and the King's Chair of the Guardians. He is gentle and kind on the surface, but when he undergoes a Character Change, he turns into a personality that shouts about "world domination." He likes Amu. Guardian Character: Kiseki—a confident character aiming to be a king.

Age: 4th Grade The Jack's Chair of the Guardians. A diligent and intellectual student. Active as a Guardian for a short period. He likes Amu. Guardian Character: Musashi—samurai style. He is a spy for Easter.

Age: 6th Grade Former Jack's Chair of the Guardians. He likes Utau. Guardian Character: Daichi (Athlete)

Age: 5th Grade The Queen's Chair of the Guardians. Although he is actually a boy, he was raised as a girl named "Nadeshiko" due to family tradition. He likes Amu. Excellent at dancing (especially Japanese traditional dance). Guardian Character: Temari, later Rhythm. Only Amu knows the fact that he was the girl 'Nadeshiko'.

Age: 4th Grade The Ace's Chair of the Guardians. Has a cute, aegyo-filled, and childlike personality. Guardian Character: Pepe—a baby-like personality.

Age: 5th Grade Amu's classmate who became the Queen's Chair after Nadeshiko left. She is shy and doesn't open her heart easily to anyone except Amu. She rarely initiates conversation. Guardian Character: Kusukusu (Clown)

Ikuto's younger sister. A popular idol. Guardian Characters: Iru (Devil), Eru (Angel)

The head of Easter Company.