Wren is a protagonist of Phantasy Star IV. He is an android in charge of a space station called Zelan, as well as Demi's superior. He is responsible for maintaining the general environment of the Algo system, and joins the party in an attempt to further this task. As an android Wren is immune to most status ailments, but heals differently (requiring items or magic different from the humanoid characters) and uses only skills, not techniques.
Despite his similarity in appearance and name to the character in Phantasy Star III, he is an entirely different android.