You are her godfather, brother (Sirius)

Sirius took the dagger away, unbuttoning the top buttons of her shirt. He cut her bra in half,  and held Luna's chin, "After what we shared, after what we went through, after what we've done, do you really think I'd murder you, like this?" he asked, placing the dagger in the middle of her chest, where the Divided mark used to be before Sirius made it vanish again, "You're my sister, I would only kill you, if you'd do me some kind of unforgivable harm," he said honestly. Why lie? Twirling the dagger in his hand, he shoved it against the door, cutting a strand of her hair. "I love you, you idiot. Like I wouldn't kill Lily or Morgan, I wouldn't kill you," he finished abruptly grabbing her arm and pulling her away from the door.

Luna let out a breath she did not know she was holding and frowned at him but let him do so. ''I don't know how you'd kill me...I thought about it but never knew.'' She muttered and stared at where the Divided mark was. Her body was covered in tattoos and marks and scars but the Divided one was the only one that went away then again magic does wonders. ''I may be your sister but at one point...you would've killed me for no reason..'' She whispered and glanced at the dagger before looking back at him. ''I love you too and you know...even if i was ordered, i'd rather die than kill someone you cared about. You should know that...'' She said and stumbled slightly when he pulled her away. Buttoning up her shirt, she ran a hand through her hair toying with the part that was shorter thanks to Sirius. ''Although i'd rather die at your hands than my 'dear' dark lord.'' Her words were honest and at the dear, her voice was placed with sarcasm.

"Go rest," was all he said. He couldn't say anything else. He just wanted the war to end and the idiocy that was the death eater's faith. He apparated away, growling as he appeared in Godric's Hollow.

Luna nodded and rubbed her cheeks quickly. Watching Sirius apparate away, she turned towards her children and kissed their foreheads. ''Mummy's a coward...don't take after me. Take after your father...i beg of you..'' She whispered to them as if they were listening and laid on the sofa, resting her eyes for a moment which led to her falling asleep.