"Why is her costume a sweet choice?" Billy asked. He imagined it was cat-themed in some way, although beyond maybe ears and a tail he wasn't sure what you could do with that. Of course, Batman had cat ears too (because bats had seriously big ears and Batman had small, pointy ones, which were totally cat ears) so maybe you could be really liberal with your animal themed costumes. Whiskers maybe? You could add whiskers to a cat themed costume.