He can have two different forms, one being a tiny and soft jumping-spider form, with little paws and tiny fangs that looks completely harmless- and the other being a much larger, more intimidating spider-centaur thingy- the lower half is a spider, just- a spider. And the upper half is a sun-themed demon, with little frills around the head that mimic sunbeams. Sunny is sometimes violent in the larger form, and intimidating- while completely innocent and harmless in the smaller spider form.