Perio's "friend"

Appearance
Perio's "friend" is assumed to be a human male. He has only been mentioned once by Roland after reading Perio's memories for information.

Personality
While he is a good enough friend to Perio to give him his powers, he doesn't trust Perio entirely with them, limiting his usage to only his arms, and only one arm at a time.

Arc 1
Roland mentions Perio's "friend" after reading Perio for information. This causes a relapse sending Perio into shock for a moment before he is taken out of it by Erik. He has not been mentioned since then.