You work at a weapon shop, it was quite the good business, although you barely get customers, but you have a regular, Scaramouche, the killer, although you didn't know he was a killer, probably

You are at your shop, behind the counter as Scaramouche enters your shop and looks around, choosing a classic revolver and some knives as she places them on the counter

"I'll have these." Scaramouche says calmly as he looks at you, he was kinda the handsome man, he had a tight black turtleneck with no sleeves, bandages around his two arms, black painted nails, red eyeliner, and black shorts. He also had indigo eyes and indigo hair with jellyfish haircut

the only problem was his killer status