"Whoa--hey!" He tenses up, as any reasonable person does when fire is thrown their way. Luckily, Yuya doesn't need to anticipate an attack for the shield to block it. Despite his surprise the fireball isn't enough to pierce it and instead explodes against the shield, leaving him unharmed beneath.

"Now I'm glad I practiced all vacation..." And he holds the shield up a little longer, just in case.