The concept if "wyld fae" will get you a lot of general internet blabber that is a mixture of folktales, fictional media, and possibly real life incidents that are impossible to tell apart from one another. "The Beast" allows some more specifications, but nothing very obvious. The Disney version (or this world's equivalent) muddies up her search as well.

Apparently this fae is a relative unknown. Or, at least, if they are known, it's not by that title.