Wait, wait, wait. Hold the phone. Stop. Just last chapter, they were saying how they could see through other spirits' illusions, so Tiko had to guess that Shian was using her powers to appear human.
So how can they tell she's not disguising herself now!?
What was up with that? "Shi-pon"?You've already met Kiri?Huh?Don't tell her how to do it no matter what, even if it kills you.Oh yes, she's a friend from way, way back!In fact, Kiri's the one who taught me how to use my power to disguise myself as a human...Shi-ponOh! It's Shi-pon!Ah, from the other day...It's good to see you again.Oh... but you're in the school outside of your human disguise...!I don't have to use my power today, so it's fine.By the way, you called out "Shi-pon" a minute ago...Instant EffectBeen a long time, Shian.Kiri!And you're already warning her!Teach me t--WHAAAAAAAAT!?Eh?