I think she is new
I think she is that chefs younger sister.
How you know that ?
In the chapter it was revealed that he had a sick sister and it was hinted that the reason he was helping the bad ppl was because the medical bills were too much. So there is a chance that the girl with the powers is actually killing the sister and acting like she is helping
Ohhhhhhh
wait who is that girl in the bed in the last panel? It's been a while I can't remember if she's someone we already met or if this is a new person