Gauche is a tall, slender-built young man with light skin and shaggy light brown hair that drapes over his forehead and left eye. He has brown eyes, while his left eye has been replaced by a small magical mirror. Gauche is introduced as an unfriendly, ill-mannered, and selfish individual, and has developed a self-serving desire to spoil her and keep her happy no matter the cost. He constantly gets nosebleeds thinking about people he deeply cares about.