Diederich is an anthropomorphic buff fox sporting red fur, white eyebrows, red chest hair between his pectorals, a white underbelly, and red eyes. Once a feared pirate from Shinryu, he is a unique knight who was scouted for his strength. He doesn't take things seriously, but his swordsmanship is top class among knights. Usually drinking when he's not teaching. He doesn't think he's suited to teaching but he's fairly well-regarded by his students.