Okay so first of all if you are new to this forum you might want to enter the world of our community and I can understand that the section for new merc suggestions sounds really interesting to you.
But please for the love of RNGesus don't open a new discussion without any kind of concept and expect your merc to pop into the game like magic.
The "Merc and Skin suggestion" part of DB is by far one of my favourites in this forum and some of those concepts are interesting, funny or even debatable to add to the game. But recently I noticed a lot of new people that just entered these holy halls are just writing random wishes for a merc just because they felt it would be cool to have a character like that.
Now I'm not saying that nobody should make concepts for interesting new Mercs anymore but please if you want it to be an actual topic and even increase your chance of getting somebody interested in your idea: Sit down and actually think about what you want, an ability and how to balance it in game.
Oh and if you want to write a backstory: keep it short. Remember the merc you create doesn't fight with his tragic backstory he does it with cold hard lead.