fan yinglets: mostly tf victims, a certain sea-gunk-encrusted green crystal/vial/thing is a common prank / induction method for them, constantly throwing them seemingly
canon of OOPs: whatever the thing that transformed Kassen is, it's very rare, and this is the first known case of anyone being turned into a yinglet. it may never happen again.
Ennis's clients: "when you transform me, can you do the zatzhing thing to me? I want to bite it to make it go off"
don't act like it wouldn't happen