Okay, so Nanami entered Crystallis very young and her home life wasn't the best, so a lot of her canon clingyness over her brother has transferred to the Heroes collectively. She's starting out wounded (and has probably been 'the kid' in a lot of Heroes' minds, even if she's now about her canon age), but she's going to try to fight. (Ironically, present!Nanami will be telling her to quit it and stop trying to be a hero.)