asahi seems unusual in terms of character archetypes, cuz stylistically she seems like someone who's calm, cool-headed, sane and in control, but behaviorally she seems more like someone who's a bit unhinged (from trauma and denial and maybe some kind of more intrinsic weirdness) and being controlled / manipulated / played-with by a malevolent entity. But she still has those calm cool-headed vibes that make you want to believe in her. It makes an interesting tension.
(oh right but last chapter did show inside her mind some more and seemed to show her being pretty much a yandere psycho, though it's not clear if she would've actually attacked the younger brother with that knife if Minoru hadn't showed up, or not, but it was implied, and that would mean she's way over the edge. Next chapter should clarify something.)