Can someone spoil me on whose the shitty traitor?

up to this, I also wanted to know hehe

First one, the principal secretary. That would make silatuna/silatunia and some others tartarus get into the school. Weakening the principal, that's why the principal gone afk forever after the second attack in Seirun. Well Leo would kill them all

I heard that the principal and his dragon assistant will be killed in the future chapters, is that real?

Yes :)

Sorry but have we met the secretary? I don't remember him/her.

Almost no appearance

damn i thought the traitor was class 1 homeroom teacher because idk his appearance just seem sus but then I guess not. I wish they could’ve made the traitor a lil more close to the students (or something the students wont be wary of) so that we’ll get the juicy betrayal arc