Depending on her ability to sense such things, it may or may not be apparent that there's something Very Mysteriously Other about that Hand, beyond just that it looks like it came from a statue but moves like a large but otherwise functional hand. (As for the sword, well, it's Excalibur, so.)

Hellboy himself, meanwhile, has an uncomfortable look on his face. "That... depends on how many nature-vs.-nurture hairs you want to split. I'd say there aren't a lot like me anywhere. Even back home, other... beings like me aren't really like me. Growing up on Earth, learning right from wrong, all that sort of stuff."