Who tf is the UA traitor?

We need this to be covered because the mystery of it is killing meeeee
Is it Tsu? Is it Denki? Is it Kirishima? If only we could figure this out TwT

DISCLAIMER: There are season 1,2,3 and 4 spoilers in here. Also this is all just theory there is no actual proper proof that these people could be the traitor, in fact there might not even be a traitor after all.

I'm new to Watt-pad, yes I know my account says I joined the second of January 2018 but I made this account then and deleted it obviously seconds after because I had no pfp, bio and i hadn't even viewed any books or stories and I just realized i had an account today while finally getting watt-pad so i can see the stories on shinkami.

Enjoy this and for those insomniacs who are intrigued by who the traitor is by a random thought at 3am so they go to watch videos and look at theories to see who the traitor is, please go to sleep, for your own god damn safety! ^w^