Board Thread:Suggestions/@comment-31096134-20170314012253/@comment-28097343-20170314043530

Ah, that. You aren't wrong--they're the same. Youkai is an alternative spelling for Yōkai. The correct one in romaji is Yōkai, and that category already outweighs the Youkai category. Therefore, you can go ahead and remove Youkai from Olie and Setsudan (Olie is categorized as a Ghost/Undead anyway. In which case, I should really make the category pages for those).