I feel like her coming onto him broke him even more...he even kinda lost consciousness. It's like a panic attack...
How is sempai revenge spreading rumors on her because she wouldn't do what he wanted her fault/self-inflicted? Sempai was a douche...
Exactly...these girls were the direct subordinates of the Knight captain...so he'd get an idea of how she'd fight through them as she most likely trained them or with them.
More importantly, he's a magician and not any kind of warrior...there's no reason for a high school boy to be a mass of muscle...especially when he's essentially a scholar(as that's what magician types are).