Adagio is one of the main characters of the Ar tonelico sidestory manga, Ar tonelico ~Arpeggio~. He is a boy from the Teru Tribe, who lives in the town of Em Pheyna, located in the middle area of the Tower. He's a member of the Purarura family. He has a childish personality and has no interest in the past story of the world. He has an older sister, An (Andante), who belongs to the Zeppen family. However, Adagio is terrified of her greatly, and thus, he chooses to avoid her as much as possible. In battle, he fights using magic and a staff.