Stigma

A mysterious boy leads an organization called Amaralilc. He suddenly appears in various places around the world and can instantly travel together with Amaralilc using his unique abilities. His powers are highly unusual—his head can be destroyed and will immediately regenerate, setting him far apart from ordinary humans. Under the slogan "Freedom for the heart," he uses a black ring capable of causing people's hearts to go out of control. According to Iko Koishikawa, who once shared a mind with him through the ring, his heart is extremely abstract and childlike, as if rejecting the idea of maturing.