Hmm for the tiny pretending to be them let's go with yan wil and Robbie
I belive Robbie would be very confused, wondering why you were pretending to be one of the (what he classified as an offensive representation) zombies like on the walking dead. As soon as you tell him you were copying him he will do one of two things. Cry, afraid if the fact you possibly have been around while he was in full zombie mode. Or Pout, saying how “not how… all ..zombies… act…” either way you would have to make it up to Robbie with some good cuddles. You hurt the poor zombie’s feelings!
Wilford? He would find it hilarious, critiquing you on certain things or how his voice sounds as you do so. Heck! After a while he will even pretend to be you, constantly making jokes about how tiny you are. Of course if he goes too far he will apologize and cuddle up with you…. after saying “if you cant take it dont say it.”Yandere? Oh. You wont be pretending for much longer, yandere quickly scooping you up into his hands and pressing many little kisses into your tiny body. His senpai liked him enough to try and mimic him! It was too adorable, snuggling you more and more as he praised your act. He loves it!