Isagi is thoughtful and analytical with a friendly, easygoing baseline, but what really defines him is his curiosity and deduction. he notices tiny changes, reads situations like puzzles, and stays composed while others panic. He has a natural instinct for spotting symptoms, decoding toxins, and seeing connections others miss. He’s not dramatic, he’s not loud, but his quiet intensity means he gets it right when it matters most. Isagi doesn’t see Kaiser as romantic, sexy, or admirable, he sees him like a baffling enigma with flashy polish and zero logical depth at first glance, as just an obnoxious, glittery pervert. Where others melt, Isagi raises an eyebrow. He doesn’t dismiss Kaiser outright, but he also doesn’t treat him like a deity of court beauty either. Isagi isn’t cold- just dispassionately observant. Kaiser’s charm doesn’t make him weak, doesn't make him swoon- not even secretly, it makes him curious (but he’d never say that).