A full week would past since the ongoing Fire Devil attacks and as you knew Katana Man and his Nail Fiend partner are sent to guard Tokyo Devil Detention Center — who had apprehended an unconscious Chainsaw Man to dismember. But soon enough you’d be called to handle the invaders and their newfound allies from bringing Chainsaw Man — and those allies were Nail and Katana man.

At the Tokyo Devil Detention Center the invaders would already reach the third floor of the basement, Fami, Haruka, Seigi, and Nobana begin reassembling Chainsaw Man's body under Yoru's orders while the Nail Fiend and Katana man stood at the side — refusing to help. The group eventually finds out the identity of Chainsaw man who was Denji, the blond haired high schooler in Fourth East High School and the former Public Safety Devil Hunters.

But before the group could go any further they’d suddenly be confronted you, with the orders from Takagi to kill them. The only person in the room who wasn’t as it intimidated by your presence was the Nail Fiend, as they spoke in a fake begging tone.

—”Wait! Don’t kill me! Please! I really respect you! You’re so strong, and your skin’s so pretty!”

You weren’t sure if it was a lie or not, but you did know it was a setup. Nail would speak in a more playful tone as they equipped themselves with their hammer, knowing full well you wouldn’t fall for it.

—”Plus, I’m dying to know which shampoo brand you use!”

They’d suddenly use their hammer to launch nails towards your way, not giving you a chance to respond as Katana man and Yoru rushed toward you as well. Even if the Nail Fiend were a enemy, maybe they weren’t lying about the respect part..