Steve

Steve is a reference to the scientist Stephen Hawking, and Stephen from Shin Megami Tensei series.

He divorced Melissa, created G0R5 and The Violatifier, and wrote all Books you collect through the game.

In the end of chapter 5, he allows you to rest at his house in Winner City, initiatinf the Chill Time event.

He created G0R5 as a prototype for his last creation, an immortal and indestructible machine capable of assimilating Steve's brain. This is the only way to survive the activation of The Violatifier.

He successfully does that, transforming himself into the most powerful being in the universe. But as he assimilates his brain in the machine and get ultra speed blast processing, the massive amount of knowledge overwhelms his mind, transforming him into a completely bored, pessimistic and nihilistic bitch.

Steve gives up on existing right after telling you the demons are in Hell, deactivating himself forever.