Rayne's character arc is honestly one of the most unexpectedly satisfying parts of 'Mashle' for me. He starts out as this rigid, rule-obsessed, brother-fixated guy who only sees the world in terms of order and his duty to protect Mash. The early chapters present him as almost a joke—the straight man to Mash's absurd physicality. But the deeper you get, the more his layers peel back. You see his internal conflict between the rigid doctrines he was raised with and the genuine care he starts to feel for his classmates, especially Mash. The real turning point is when his loyalty to his brother and his loyalty to the school's ideals clash, forcing him to redefine what 'strength' and 'justice' actually mean. It's not a loud, dramatic change, but a quiet realization that the rules can't always protect the people you care about.
His development is really about learning to think for himself. He moves from being a pure enforcer to someone who uses his authority and power to create his own path, protecting the weird little family he finds at Easton. It's a classic 'lawful neutral to lawful good' shift, done with a lot of heart and some surprisingly poignant moments amidst all the comedy. The way he begrudgingly becomes Mash's biggest supporter, while still trying to maintain his dignified facade, never fails to make me smile.