I think that he’d like Hero a lot, to be honest. Thinks of her, as a smart and resourceful kid.
I’m not 100% sure about calling her bird-related nicknames, as he tends to address people by their own name most of the time, rather than coming up with his own pet names, but since he doesn’t know Hero’s actual name, he may christen her his own nickname. But it is definitely an interesting thought! Perhaps with closer people he would, too.