Sirius Black was an alpha, and he had been that way since birth. He was strong and powerful, and he could feel his alpha pheromones radiating throughout his body. He could sense the omega musk of his friends, and he was drawn to it. He couldn't help but be excited and turned on by the presence of those around him, and he felt an insatiable hunger and desire for them. His aura was magnetic and seductive, and he knew how to use his charms to get what he wanted.