Tolkien spent like his entire life working on his world, man.

Unfortunately he also died before he completed things, so some things there's like 8 versions of canon and you kind of just choose the one you like best.

And yes! She's also like literally the prettiest thing ever. Like. Canonically. She's the most beautiful person ever in all of creation who ever was or ever would be she's based off of Mrs Tolkien and Mr Tolkien sort of went a little overboard with her as a result. And hm, that could work out then.