i always imagine if she was an animagus she'd be an eagle
and i think it perfectly fits

Or a wolf

she'd fit to a raven

I think a fox or a snake would be fitting too.

^no i think a kind of bird fit her most because of her necklace its like a raven or eagle skull

^ Oh that's true

Lol just changed my answer because I relized we where talking about animangus not patronus. I think Bella's patronus would be a bat. And her animangus form would be that of a raven or a crow.

@BellaLovett
Oh yeah, I forgot about that! That's a good point.

I have no idea.

I always see her being a cat animagus, and here's why:
When a cat catches a mouse, it doesn't just kill it straight away. It tortures and plays with it.

That or a cat