Do not apologize

You were hot headed and that was a stressful situation, without thinking straight you said:

"I'm not wrong, I won't apologize!"

Luhnasa glared at you, but the next moment just snorted at you, crossed her arms and looked away from you.

Filling yourself with courage, you say what you really think:

"You...you should be the one to apologize! This whole situation is your fault! This guy shouldn't even be here! And I barely interacted with Miss Charlotte Gardien, let alone invite her to my room! And there's more... "

"Very well little boy, that's enough." Said Chann Radolf, "You talk too loud for someone your size!" You quickly realized that Radolf was trying to cast a spell and it was against you! You didn't know what it would be, but it couldn't be a good thing. However, his hands were still covering your modesty.

You could just try to roll to the side and dodge, of course, but you didn't even know what kind of spell that guy was going to cast, what area he covered and what its effect was, besides, and then what? You couldn't dodge forever. Not. A counterspell was your best option right now, even if you had to show your full nudity by taking your hand off your crotch.