I think he started out as just a generic bird so the shaping is a bit random... he still needs a lot of work.
Thinking about it some more, he might be the special weapon, with a super-natural aspect like Golden Axe, a giant fiery seagull sweeps the screen smiting the girls enemies with a big gull shriek (perhaps just keeping them awake at night). Or a hundred normal sized ghost-gulls swoop down at high speed and peck the enemies to death. Spacebar on Amiga, A on megadrive, Snes - the whole game didn't get published due to its controversial early 90's bikini policy.
Yes I am making this up as I go along.