In the books, the Ghost of High Heart says, "I dreamt of a man without a face, waiting on a bridge that swayed and swung. On his shoulder perched a drowned crow with seaweed hanging from his wings." Heavily implies that Euron hired a Faceless Man (Jaqen?) to kill Balon.

It's just the one character. Vaan (from XII) and Tidus (from X) are functionally identical. I was going to say X doesn't have anyone who looks like the rabbit lady on the left in that picture, but I guess it has the cat man. Furries!