Ikuto Chara: Yoru

Yoru(ヨル)is Ikuto's cat-like Guardian Character and represents Ikuto's desire to be free like a stray cat. 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 voiced by Miyuki Sawashiro.

Ikuto Tsukiyomi

Ikuto Tsukiyomi (月詠 幾斗) is a high school student 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. Ikuto has developed feelings for Amu and possesses the Dumpty Key which pairs with Amu's Humpty Lock, but currently, it doesn't fit in the keyhole. Like his father, Ikuto is a skilled violinist. The Dumpty Key used to belong to his father's. 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, basically bound her children to working for Easter. Whenever his younger sister tried to kiss him or otherwise, he usually tried to deflect it, because Utau was in love with him even though they were siblings. Ikuto's personality is pretty outgoing and a little naughty. He likes teasing people, especially Amu and Tadase. In the manga timeline, it is shown he Character Transformed with a new black Guardian Egg to become Death Rebel, according to Easter's brainwashing plans.Ikuto is voiced by Yuichi Nakamura.

Tadase Chara: Kiseki

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 Training'. However, the other Guardian Characters will ignore him when a situation regarding an X Egg occurs. 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 gains this ability with the help of the Amu (When his egg gets tainted with an X), becoming Platinum Royale.Kiseki is voiced by Kaya Miyake.

Tadase Hotori

Tadase Hotori (辺里 唯世) is a boy in the same year as Amu and serves as King's Chair of the Guardians. Amu's develops a crush on Tadase soon after he transfers into the school. However, whenever he hears the word "prince", his Character Changes into an egotistical king who seeks world domination. Like Amu, he is actually a shy person and is not good at public speaking, instead he Character Changes with his Guardian Character, Kiseki. When a girl confesses their love to Tadase, he will have Kiseki reject her. His love interest is Amulet Heart, Amu's Character Transformation with Ran, but it later becomes Amu herself. 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.Tadase is voiced by Reiko Takagi.

Amu Chara: Dia

Diamond (ダイヤ)
Diamond is Amu's fourth Guardian Character. She becomes an X Egg when Amu dislikes all the changes that were happening in the spring. While Utau 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 she has a black X-shaped clip covering her yellow diamond-shaped clip. Because of this, Amu doesn't know Diamond's true name. In the Japanese manga, Diamond's name is shorted to Dia. Diamond can Character Transform with Utau, becoming Dark Jewel, but however, the transformation does not last very long. When Amu finally is able to purify Diamond, they undergo a Character Transformation, becoming Amulet Diamond. Afterward, Diamond returns to her egg until she sees that Amu "shines again". In the anime television series.Diamond voiced by Kanae Ito.

Amu Chara: Suu

Su (スゥ)
The third Guardian Character, Su, represents Amu's desire to be more caring 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 Amulet Clover.Su is voiced by Aki Toyosaki.

Amu Chara: Miki

Miki (ミキ)
The second Guardian Character to hatch is Miki. Miki represents Amu's desire to be more 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 and Ikuto's Guardian Character Yoru And Kairi's Guardian Character Musashi. During Character Change, Amu gains increased artistic abilities. On Character Transformation, Amu becomes Amulet Spade.Miki is voiced by Nanae Kato.