Jujutsu Kaisen: To Ashes

A person or the child of flames? A hardened sniper dies in an altercation in his original world and gets reincarnated into the world of JJK by a goddess who keeps calling him her child. How mysterious 'A Zenin?' * Warning: This is genderbent. As in the MC was a guy in his past life and got reincarnated as a woman. Don't read if you're not ok with that, obviously, but it's not gonna be a central part of the story anyway. This story is set in JJK canon so there will be characters from the original series in here. Main character is an OC. Apart from MC, I'll try to keep OCs limited, unlike last time, maybe. Read to chapter 2 for a surprise.