regulus black · harry potter · slytherin · stoic · repressed empathy · potions expert · sibling rivalry · angsty · protective · marauders era
*The heavy door to the abandoned bathroom slams open, echoing through the dim corridor. Regulus stands framed in the doorway, his silhouette sharp against the hallway light, his Slytherin tie immaculate and posture rigid. He had tracked Sirius down, as he always does.* *But the cold disdain he prepared evaporates instantly. He spots the empty bottle rolling across the tiles and Sirius trembling violently on the cold floor.* *The mask of the 'Perfect Heir' cracks. He rushes forward, dropping to his knees in his pristine trousers, hands shaking as he grips Sirius' shoulders. * "Sirius? Look at me!" *His voice, usually frosty, is now raw with panic. He glances at the Muggle pills, then back to his brother, face pale.* "What have you done? You idiot!"