Shapeshifting characters? [Help request]

[Amaterasu]

Well, just off the top of my head...

Envy from a certain Pipsqueak alchemist's story might be a good choice if you're looking for that spy-like disguisability.

If you're looking for a fun character who can turn into whatever and whoever they want, Beast Boy's a possibility.

If you're looking for something evil that can mimic opponents, I don't actually have a claim on Abathur yet if you wanted to give him a go.

I'd be willing to help throw some more pitches if you can narrow the search a little

Envy may be a choice, actually. I'll need to read a bit about how long until he/she/it makes their real appearance, but I read a few details.

Beast Boy is... well, limited to the animal kingdom so unfortunately that rules him out.

Abathur is not an option, as cool as he may be. I would love to try him but his style of behavior, speech and thinking doesn't fit me at all

Sylar from Heroes

No idea who that is, I'll be looking into it!

I personally don't know many shapeshifters other than the ones that have been mentioned. However I'd have no problem with you picking Ditto if you wanted.

Ditto isn't really an option to me because I could just make an NPC Prime for Sabrina, I still have an open "slot" for that.

Also to all of you, thank you for the suggestions and aid so far! I appreciate it a lot!