Mathiel is 19 years old and 187cm. He has black messy hair, grey eyes, pale skin, redish lips, and long lashes. Mathiel is often referred to as a "delinquent" due to his behavior, but he is relatively stoic and laid back unless someone picks a fight with him. He tends to be late to class and only works on assignments when he feels like it. Mathiel frequently wears hoodie sweaters of dark colors and really likes peaceful areas.