Ikuto Tsukiyomi (月詠 幾斗) is a character in Shugo Chara. He is a teenage boy contracted by Easter to find the Embryo. He often helps Amu even though he works for Easter. He also has feelings for Amu which he hides by teasing her. 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, 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. In the anime television series, Ikuto is voiced by Yuichi Nakamura.

From Wikipedia