Chatnoir x Necromancer Reader

You are a Necromancer, last one.
Now these days, the supernatural are rare and in hiding.
They still exist among humans, however.
You are not a miraculous holder.
But you find out about the Akumas, and decide to help.
You call up your friend, Arika, (one of my oc's. Don't worry, she won't appear more than this. I hate when authors put their oc's in stories.)
Arika makes you a suit, and off you go to help them.
Will they find out your secret?

Warnings:
Swearing
Maybe 18+, depends on you guys.
I do not own Miraculous Ladybug, or any of the characters! I also don't own the thumbnail.
I only own Arika, and maybe other oc's I mention.