@UWUWUW I’m MOTHERLES y'all so dumb and don't actually know the reason why everyone is after Chainsaw man's heart? Aka Pochita's heart before he gave it to Denji, it's said The chainsaw devil is one all devils fear, which is why they said before they die, they hear the sound of the chainsaws. Which is probably what Makima wants to do with by toying with denji, even after the Reze arc, he defeated her, showing just how powerful the chainsaw devil really is.
Spoiler!
I'm a girl-