Ruby and Bella both to me seem like they are similar character wise, and I don't get why the writers made them both at the same time.
If I had a preference, I'd have ditched the Ruby actress and merged Ruby/Bella into one character with the Bella actress.
Both are a little annoying, but at least Bella so far has shown some levels of depth beyond "I'm a sarcastic annoying demon who smirks and scoffs at everything and everyone!"
