(Warning) "You don't want to swing your sword like that yet, it would cause an unfair result in the upcoming battle if one of us gets injured before it begins."

(Confident) "You may have gotten in a lucky hit, but I'm not giving up yet."

(Worried) "It was already hard enough to come to you about anime, I really wouldn't want the whole school to find out, especially not when Akahana is always keeping a lookout for any new gossip."