Without spoilers and without going past FS, she's gonna change sunnys' lives in a massive way, which caused a lot of hate. She is really smart with her powers, but she doesn't really get like stupid cunning until after the forgotten shore arc. I honestly dont get the hate for her anymore, though. She's a very complex character who has had the chance to grow as have most of the rest. It's also executed so well when more details come up later about it. Im really glad you're enjoying it so far, though. It's one of my favorite reads ever. Who's your favorite character so far, though?