Probably a phoenix or a thestral. Yeah, I'm tacky. I know. I'm a huge fan of the character development and the mystery. The Dumbledores are my favorite, so obviously phoenixes are up there, and thestrals just have this veil of mystery but still seem lively and spry. If we knew more about them or saw one, I would say horned serpent, but as of now there's really nothing related to them. When it comes to beings, I'd have to say pukwudgies. I love the similarities to house-elves, but they're more of an ally or friend than a servant.