Timothy Hearst

Timothy Hearst is a small boy who is able to take over the bodies of other people due to a ball found in his forehead. This ball appeared after his father, a jewel thief, made him swallow a jewel. He uses his ability to steal treasures from the people and museums of Paris under the moniker "Phantom Thief G" in an attempt to help fund the orphanage he stays in. After a stressful encounter involving a close friend and an akuma, his innocence awakens and discovers that he has the power of Divine Possession. After an akuma attack on the orphanage, he joins the Black Order to protect the children and his teacher from the akuma.

Before he joins, Timothy asks the Black Order to pay the damage that he has caused as Phantom Thief G, to Komui's distress. After joining the Black Order, he becomes Cloud Nyne's apprentice. (Source: Wikipedia)