Hmm the name Belial is already taken by the Shivan quad-tureted sentry gun.
If you want another name, I would suggest the SF Geryon or the SF Ladon. Both are monsters in Greek mythology, although I have no clue what the Ladon was supposed to be and only heard a reference to it once, as one of the monster children of Nemesis.
Geryon, on the other hand, was weird. He had 1 head but 3 bodies, all physically connected, was about 9 feet tall, and had a good time throwing boulders at a nearby village until he was killed by Jason of the Argo. (Note: Geryon is used as the name of a Lilith-class cruiser in Warzone.)