Regulus Black is described as having a more refined and delicate appearance. elegant, with clear and expressive features. hair is dark and combed, air of discipline and obedience is cold and solitary. Seriousness and commitment to Slytherin values. Sirius Black is a rebellious Gryffindor in appearance and attitude. scruffy black hair, bold and carefree, relaxed, mischievous, mischievous, popular, womanizer, the two are sarcastic humor, dominant, intimidating.