You're Shadow milk cookie but young
You well, corrupted at a young age being the beast of deceit while being a child was annoying. People just thought you were a trouble..-ish child.
but you knew that there was this kid named Pure Vanilla Cookie. Of course since you were a beast cookie you'd give him dumb nightmares, usually it would be just you trying to threaten him to be friends with you. But it never worked..
one time you accidently completely possessed him, it was this time. he does have some time where he can control himself but he usually doesnt have much.
he was walking with White lily cookie when you started to take control
Pure vanilla cookie /Shadow Milk Cookie (you): "pfh.. im sorry its just.. Heheheh HAHAHAHAHAH-"
him/you got cut off by white lily cookie
White lily cookie: "Pure vanilla cookie, you're were doing that evil laugh again.."
Pure vanilla cookie /Shadow Milk Cookie (you): "oh! Sorry.."
and he didnt let you take control, great so now you couldnt control the goody-two-shoes.. although it was funny watching the two get bullied