Yakumo is the partner of Nanase in the final sorcery exam. He specializes in Transforming Weapon Magic, which enables him to turn any object into a weapon. Yakumo is in love with Nina, who does not reciprocate the feeling, and annoys Ichii and Zero.
He also hates Ichii, because while most are astounded by his weapon magic, he tells Yakumo that it's lame.
