[ well, he's right about figaro being useful for humans here, but figaro himself isn't human despite coming off as a cheerful doctor. he's... just that good at concealing his magical potential unless asked, among other things. ]

That they are. This island works on some sort of a desire system which grants our whims in positive or negative ways. The adage "be careful what you wish for" rings true here.

[ he picks up a written instruction, which exclaims its use as if on cue. ]

See? It's a protective talisman. So there's nothing to worry about.