Athough he was an pacific, a bit dopey, but asthmatic kid named Esteban (Steven), he eventually became a crazy, cold, and a serious-expression looking cyborg who ended up hating humans and left his human side apart, hence the pale skin he ended up having, represents a dead human. But even now, some Steven still is inside him, that's why he has dark cicles under his sad looking eyes, that side of him is feeling great regretion towards his action athough he's not concerned about it. His right arm (his right) is robotic.