I know, I just think that specific bell instrument sounds the best for Bella in normal mode
Durple also shares an instrument with a character from Spruted (not that it really matters)
by the way, if you restart the game after removing Jevus in normal, if you place another character where he was, that character triggers horror mode when removed
it's easily fixable: create a variable for the game to know if Jevus has been placed or not (I once had the same problem while working on A Musical Mishap)