There's been a theory that Kobeni had a contract with a devil related to luck. Lmao I mean she'd survived this far. I think chapter 28 is gonna play in where she saved Denji, Pochita probably heard what she said and this will probably be the reason he won't kill her. Which is lucky on her part.
I think there's an irony that she'll probably manage to survive most situations but in exchange for her life being utter suffering.