Calamity

A rather chaotic entity who does whatever he feels like, Calamity is an annoying guy who shows up, causes chaos, and then gets killed. While the net is currently working on a way to render him permanently dead, that hasn't been figured out yet.

His favorite hobbies include giving people things with random results, creating deals where he gets souls, being a general bastard, messing with Sera, and doing things without absolutely no ramifications for their consequences.

Of course, Calamity wasn't always exactly a bismuth 7D entity. The usual suspect was responsible for his creation. Obviously, he's not really a fan of Scale.