The misunderstood teacher (kokushibo reader x hp)

You messed up you really did

Y/n pov-

This is just fanfuckingtastic raven s alive and i left the rwby team almost at deaths door so there is a big possibility that they might come back for revenge

Me- you did it quirrel you made my day

Quirrel- h-how so

He asked sill scared

Me- oh dont be scared i wont hurt you since you gave me such a good news and as a reward i wont tell anyone about this and you continue to be my spy also just a second

I suddenly vanished and apeared behind a death eater , I grabbed their face and stared into their eyes 

Me- wassup bitch 

Then suddely my demon tendency took over and i bit their face off 

Me- oops sorry not sorry

I looked down to see quirrell absolutely horrifed 

Me- what ? 

Quirrel- n-nothing

Me- alright then lets go

With that we walked out of the forrest

THE NEXT DAY

Y/n pov- 

Man it felt really good to loosen up a little but anyways whats the schedule

I got up and walked towards the time table 

Me- hmm today it seems to be swordship skills with gryfindor and ravenclaw , hmm this will be intresting as even though not enemies the are completley opposite , gryfindor rushing into battle while ravenclaw thinkin through , lets see

I then went to the grounds where ron and terry boot were fighting 

Terry- so what i can just write a new spell which will deflect your sword

Ron- oh yeah!!! but what if i reach you first like i did to your mother

Me- thats enough 

I said while releasing some of my pressure

Me- now if you are so certain about your capabilities why dont you  work together and try to defeat me , see if they work?

Ron and terry- u-uhh sure

Me- great , on count of three 1,2,3 GO!!!

Terry- stupefy

The spell was launched at me , I intentionally took the hit as ron charged towars me raising his sword high

Ron- moon breathing 1 st form - dark moon evenig palace

Me- tch idiots

I dodged the slash and hit ron with my scabard , i then sidestepped behind terry and breathed down his neck

Me- its over terry 

He turned towards  me , terrefied 

Me- haha he look on your faces , god!!

???- um teacher what did you want to teach them

Me- hmmm nothing I just wanted to beat them up

The class was horrifed at my answer

Me- take a joke you guys , what i wanted to learn is though this combination is capable ,THEY ARE TO FUCKING WEAK , SO ALL OF YOU GET YOUR ASS OVER HERE AND PRACTICE TILL YOU DROP DEAD, UNDERSTAD?!?!?

Everyone- YES SIRR

They then started practicing as i sat under a tree and watched them

Smiling to myself i remberd the event of the previous night

Me- mannnn their luck must hate  them that they need to deal with me twice 

???- um professor y/n?

Me-yes quirrel?

Quirrel- I-I need some help

Me- go ahead what is it

Quirrel- *takes a deep breath* I need you to cut my arms of