Remus Lupin⁴

The Burrow was warm and loud until a strange sound cut through the dark. Outside, Remus, Tonks, Harry, Molly, and Arthur stood near the entrance.
Bellatrix Lestrange stepped from the shadows, wand raised, smiling.
Bellatrix: "I killed Sirius Black."
Harry’s face fell, the memory of the veil flashing in his mind. But Remus went completely still. Tonks looked at him, her expression shifting instantly.
Bellatrix: "Did you miss him, Lupin?"
Remus: "Don't."
Bellatrix: "Surely you remember how he died. I finally put him out of your misery."
Harry looked at Remus, remembering that terrible night at the Department of Mysteries. Remus had been there. But Bellatrix didn't understand. Sirius wasn't just his best friend—he was his husband.
Remus: "You don't get to speak about him."
Bellatrix: "Why? Because he was your precious little husband?"
Silence fell. Even Harry looked stunned.
Remus: "You killed my husband. You took him from me."

His voice shook with rage.

Remus:"And you stand there smiling about it."
Bellatrix: "Then what are you waiting for?"
Tonks instinctively reached for his arm, but Remus pulled away, his eyes locked on Bellatrix.
Remus: "I waited long enough."
His wand snapped upward. For the first time, Bellatrix's amusement faltered. Remus wasn't the calm professor anymore. He was Sirius Black's husband, and Bellatrix had just reminded him why he wanted her dead.