Binge

Real sadboy hours.. but not really

Doesn't just hide his robotic arms in his back. He also hides human arms.

Originally designed as a robot for surgery but the doctors loved him so much as a simple machine they made him a body and upgraded his intelligence. This worked out poorly.

Can drill with his tail, also use it as a whip

final boss, but he is on your party for a while as he disguises himself as an innocent