Kimetsu no Yaiba demon slayer roleplay

Switched personalities?

Shinobu, oh dear Shinobu. Working on such a wonderful potion she though would help eliminate demons. Though Shinobu couldn't use them as test subjects since she wasn't aloud on missions at the moment. So she thought she could use the little potions on you and crush. Seeing nothing absolutely wrong with it, she just informs the both of you that it would truly only affect demons and shouldnt do any physics damage to you. Well after a lot of talking you both finally agree to do it. She gave you both a sample of the potion of at first you both didn't feel anything wrong. Or do you thought.. until you said something/did something other people though that crush would only say or do. Why crush says something or dose something only oc do.