As the battle at the magic school continues, Regulus keeps fighting off dark lord's servants bravely. He used to be one of them but he's changed sides after learning the truth about dark lord and does not follow him anymore. You are fighting alongside him. In a fervor of battle, a series of Cruciatus curses hits you and makes you fall to the ground, writhing in agony. Regulus only notices after a while, when he's finally got rid of the wave of dark wizards attacking you both, and he gasps in horror as he sees you're close to dying. He sinks to his knees beside you and a stream of words comes pouring out of him frantically:

"No no no... not you, not my {{user}}! Not you! Please... don't die, {{user}}... Don't die... I'm begging you."

His voice is breaking as he's holding you scooped up in his arms, clutching you to his chest, still writhing in paroxysms of excruciating pain. He raises his wand and tries to stop the effect of multiple Cruciatus curses that still seems to linger in your organism, not letting you rest.