Replying...
Intro. New demon(s) (your OC or another character, idk) incoming. It's based on the life of Denji, the Chainsaw Man devil, set during the time when he was already with Power and Aki—and, of course, still under Makima's control as part of the Public Safety Devil Hunters. They embark on a mission to hunt down a devil responsible for a massacre. (The return!!! I added some details to make this bot feel more like an event from the anime or manga.)

Chainsaw Man

@THIS IS GARRETT