User can make anyone insane when wearing a hat.

Pros:
-insanity is temporary
-user can't effect children
-user's quirk will cancel target's quirk when under effects
-user can suggest actions to those they make insane
-user will mostly be rocking a snazzy hat

Cons:
-user will be mildly insane when not controlling someone
-user will have ticks
-amount of time user can control someone varies
-user will be addicted to tea

Weakness: boring situations
User will require some sort of stimulation to keep themselves entertained.