Haruki actually loved his sister. Even if she wasn’t always the nicest person around. Even if she sometimes treated him like shit. Even if she found his interest in robotics a nerdy thing and constantly teased him about it. Haruki loved his sister like a good brother, accepting all the parts he didn’t love. And that is why he screamed when he found her dead on his porch.
After he carried her inside his whole world broke down. His sister couldn’t really judge people and often ended up with the wrong people to befriend at her side. Just this afternoon when he waved her goodbye, he had warned her about the criminal gang that had been roamed the city for a while now. They killed most of their victims. And so did they kill Hikaru too. Haruki sobbed next to her body, vowing that if he could he would change back time and save his sister. Maybe even sacrifice himself for her sake. And that was when his eyes fell on his studies. He had been studying robotics for a while now… Maybe that could save his sister! He ran to his room, not even bothering to call the police, and dragged all his equipment over to the living room. He would, surely, find a way to revive Hikaru. Even if it would take him all night.
And it actually took him all night. And even with getting his sister’s vital functions to work she wasn’t ‘done’ yet. Hikaru’s right arm was mauled, and both her feet were cut off. It almost made Haruki vomit, but he was too dedicated and swallowed it down for the sake of his sister. Making artificial limbs wouldn’t be /that/ hard. He had even done it before. It just took a great deal of programming and they had to be connected directly to her nerves in order to work with her board chip. Haruki greatly disliked that he had to turn his sister into a cyborg, but it was his sister after all. They didn’t have their parents anymore. He had no-one without her. And he couldn’t stand that idea. He couldn’t stand it to be alone.
It took Haruki a month, in which he probably ate almost nothing and slept about 4 days in total, to completely finish Hikaru’s limbs and programming. And now, with the work completed, he was dying to wake her up. Almost literally. She without hesitating, he pressed the button and watched as his sister stirred, just as if she had slept for an entire month. “Hikaru, can you hear me?”, he asked quietly. Hikaru opened her eyes and stared at him. “Haruki, the fuck, you look like shit…”, she muttered. Haruki nodded, and started crying uncontrollably.
Hikaru was angry. Hikaru was sad. But most of all, Hikaru was happy to have such a dedicated and loving brother. She hugged him for so long she feared he fainted in her arms, and after that ran off to the kitchen to make him a decent meal. Haruki had programmed her to understand what he had just done for her and she was entirely grateful for it. In the kitchen she heard that the criminals who so cruelly killed her were still active.
They wouldn’t be after she was done with them.