What Delphini wants
Delphini isn't quite a child. She knows what she's not because of the burning emptiness in her heart. She'll never be a child.
Children are inherently innocent and kind, blank slates for the taking. They are reared with soft gazes and cold hands.
Nobody wants to protect or love her.
That's the price she pays for being Voldemort's child. Her lineage was being used against her, and the sins of her parents were being thrown on her. It was like red wine spilled on a white dress, resulting in scorn and judgment by others. Maybe she wasn't a child, to begin with, but she wore a white dress, all the same, one that was stained with blood and tears.
Ironic, isn't it, to be judged for her blood. The wizarding world had just fought a bloody war, and they judged her for her own blood. It made her want to laugh, to tear everyone apart. Whether that came from Bellatrix or her father, she didn't know.
That's what everyone is like except for Harry. Harry is something... different. She likes him. He's so different from the stories everyone tells her about her mother. They expect her to be evil, this crazy carbon copy of Bellatrix, but that's not what she wants. Delphini wants to be 'just' Delphini. No one can see that, though; they know what they want. She can see it in how Narcissa looks at her when she thinks she's not paying attention. Yes, Bellatrix was her sister, but that didn't stop the fear in her eyes.
Harry looks at her with kindness, never pity. That's when she feels the most loved. Is it sad? She's not sure. A bitter part of her wishes he was her mother. It was an offhand thought that she hadn't thought of before.
But now, it was at the forefront of her mind.
Harry is so kind, and Delphini wants that kindness. She wants a soft smile, gentle hair brushing, forehead butterfly kisses, and tea parties. Here there is darkness and loneliness tinged with sadness because there is no one who can love her. Not when they see her red eyes and think of others. Or when she slips into parseltongue. They then look at her in fear because they don't see Delphini. No, they see Voldemort, the man who tortured and killed others for a cause he believed in.
No one sees her. They see her parents, and sometimes she hates them for that. Nobody sees Delphini. She's lonely, haunted by the legacy her parents left.
Harry's lonely, too, she thinks. If he weren't, his eyes wouldn't wander, wouldn't be searching for something that isn't there anymore. Maybe he misses her father too. Nobody is one-dimensional; neither of her parents is. Even though they fought each other constantly, they knew each other intimately. Most probably wouldn't be able to tell, not when they look at Voldemort and see evil. Not when they look at Harry and think Savior. They are similar, even if they denied it in the past.
They were both orphans, a byproduct of a war that ruined the lives of many. They both were left at the mercy of muggles, one hurt in an orphanage and the other in a home. Dumbledore didn't listen to either of them and wouldn't help them. Both of them were powerful. Harry can deny it all he wants, but the truth is that he has power in spades. They both had so much magic, so much more than the average wizard.
They have left her a sad legacy, one that mirrors theirs. Delphini knows that her father loved her and can faintly remember the care he held her. They said wizards born under the effect of a love potion couldn't love, but that's a lie. Her father loved her. She knows that. That memory is all that she has left, and even now, she is scared that she'll forget it one day. What if one day she can't remember him at all?
That's why she's going to do this.
If she goes back far enough, she can have her father, her papa. Harry can be her mom. That's what he's going to be. They can be her parents, get married, and be in love. It might take a while, but it'll happen. That's what Delphini wants, and she'll get what she wants.
She's a Black, after all, and the daughter of Voldemort. She has power in spades and the cunning to match it.
Delphini closes her eyes, palms dripping blood, then she falls.