'Monster' In Darling In The Franxx

An experiment from a young age and used as a killing machine with no end, a person who has killed millions upon millions of people gets reincarnated into Darling In The Franxx. Would you like to see the outcome? (AN: I'll say this now, I do not own anything of Hitman, Darling In the Franxx or anything that I use from shows, movies, anime, manga or games or anything copyrighted and please dont sue me and also i don't know who made the cover but it's not mine)