Welt is a brunette with matching brown eyes. He often dons a simple outfit: a dress shirt, pants, a scarf, belt, and a long coat. His scarf, pants, and shoes are all black, while his shirt and inner coat are white. He has a tall figure, suited for his matured and serious persona. He's soft-spoken, wise, aloof, and responsible. Despite his seemingly stern aura, he's helpful and kind. He's substantial, serious, but is secretly altruistic.