Makima from 'Chainsaw Man' is really a puzzle wrapped in an enigma. Your research has turned up some real meaty stuff! Without preamble, Makima is a devil in truth - the Hell Devil to be exact. Her abilities are so close to her essence and status that they make up her very being. The depth of the fear she instils becomes her power to grip.
Before you imagine her growing horns and a tail, I should point out that her 'devil' appearance is not what you might expect. She looks very like a human and that only adds to her mysteriously attractive appearance.However, do not let your eyes deceive you. This character is a wonderfully constructed paradox, twisting together malevolence and allure.
She is different from an ordinary devil.She is the supervisor of Public Safety Devil Hunters, using her powers not just against devils but also towards humans in order to control them. When you make the sort of claim that she does about 'the greater good', you get into very murky waters of ethics.
That's the borderline about Makima, for she could hardly be more of a paradox. As I see it, Makima's character adds even more depth to the overall story. Tatsuki Fujimoto has done an excellent job of creating such a multi-sided character. How it's interpreted is something that’s quite open to readers.
In short, Makima is a fascinating character who is difficult to ignore. She adds several layers that increase the narrative into questions of morality, power and control.