Teddy had convinced him to sign up as a way to try and focus his energy, give him something to look forward to and work towards. Gilbert wasn't so sure it was doing the trick, but he did try for his friend's sake. It also helped that his basically brother needed someone to practice with since he was hoping to try and participate in the competitive duels.

Gilbert bowed in return to Eugene in an unpracticed sort of way, but he seemed sincere. He doesn't quite remember Eugene from school, although they seem to be about the same age. Gilbert hadn't been a menace in Defense Against the Dark Arts, but he hadn't been a star pupil, either, so he felt a bit ill prepared.

After Eugene cast the jinx, Gilbert raised his wand and firmly cast, "Protego." It was the first spell he could think of as far as defense went.