Seranikai

I particularly like the claws, very clever use of the minifig hands. One suggestion would be to change the elbow joints - the system plates really stick out to me, everything else is so smooth and curved. This would make a great diorama if you made a few more MOCs to go with it.

Everything flows very nicely, and it's easy to tell that it's a fusion. One detail you might add would be a equivalent of an R2 unit behind the cockpit. A Krana, or some other small Bionicle-related thing? A mask would be too big, though it would tie in nicely.