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. Amu's develops a crush on Tadase soon after she 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 in their final battle. Later on he agrees to help Amu save Ikuto from Easter.In the anime television series,

Tadase is voiced by Reiko Takagi.

Ikuto Tsukiyomi (月詠 幾斗, 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. Ikuto was born to find the "Embryo" and to serve Easter. Ikuto 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. 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. In the manga timeline, it is shown he Character Transformed with a new black Guardian Egg to become Death Rebel, shocking Amu and everyone else. He is being used by Easter to find the embryo and while he is Death Rebel he can't remember what he does since he is being brainwashed at those moments, while in Doki, Ikuto has taken notice to Amu's sudden change. In the anime television series.

Ikuto is voiced by Yuichi Nakamura.