The queens puppet (Fem! Reader insert) Seraph Of The End/Owari no seraph

Before the vampires killed all the humans, they broke into a high security lab, that contained genetic experiments, under the command of the third progenitor, Krul tepes, there they found a 'Child' Chained to a wall, beaten and bruised, Krul tepes decided to take in the non-human child and raise her as a puppet