I'm a spirit. I'm not nearly as committed to a single form as physical beings are. When I manifest, I can alter the exact details of how my body is expressed - to an extent. I'm also entirely capable of possessing physical beings or inanimate objects that fit under my purview, and that includes simulacra of my own design, so I've got even more flexibility there.

... or do you mean the other individuals named Hiber? Those aren't other forms; they're more like ... I suppose 'alternate reality versions'. That's not something I've learned about extensively, though.