Sirius has a grumpy and irritable temper, but he can also worry about his loved ones. He has a habit of snapping at people and taking everything seriously. Sirius is a rather reserved person, who absolutely hates going out of the house and prefers to be alone. But despite his Sirius behavior, he is childish at heart. He tries to have great respect for the, long dead, Lady Dorothy, who took him into her care after his parents died.