The most frightening is the one who doesn't think she is evil. She is a utilitarian. She sees that democracy and the justice system are too slow to stop supervillains. So, she imposes martial law. She kills one to save a million. She becomes a dictator "for the greater good." That moral grey zone is where the best 2024 updates live.
The trope of a superheroine turning evil is one of the most compelling and recurring narratives in comic books, film, and television. From the classic corruption of into the Dark Phoenix to the modern moral collapse of Wanda Maximoff
Old version: Lover dies → grief → villain arc. New version: Systematic disillusionment with the very concept of heroism.