I'm not too sure about girl part, I put the harem tag to not attract people who are non-harem then for it to become a harem in the future. The problem with Aot girls is it is hard to make a relationship start with them. Like Mikasa is obsessed with Erin for example and Annie is cold and closes off everyone around her.
yeah I know but she has blue hair you can check the wiki
Honestly there are the exact same in power growth but as a hero you don't get dragged into guys game.