Azul is a fair-skinned boy of average height. He has short, wavy hair that's a cool light-gray color. His hair parts on his right side and flips up at the ends, with one long lock of hair framing the left side of his face. 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 with a gray frame. He is often shown with a modest smile and calculating gaze.