Azul is a fair-skinned boy of average height. He has short, wavy hair that's a cool light-gray color. His eyes are the same color as his hair, but a bit darker. A small beauty mark rests below his lip on the left side of his face. He almost always wears rectangular, half-rim glasses. He is often shown with a modest smile and calculating gaze. He always wears a suit with a coat that goes to his knees draped over his shoulders.