Mash is a quiet and kind boy, though he often appears indifferent with a stoic, blank expression. He is of average height with a muscular build, pale skin, and black bowl-cut hair. A fake magical mark is drawn on his left cheek. He is often seen eating cream puffs. At Easton Magic Academy, he wears the standard school uniform: a white shirt, black trousers, a red tie, and a black cloak. For training, he wears white shorts and black under armor.