She is the sister of Light Yagami, daughter of Suichiro Yagami. Light Yagami is Kira, she doesn't know this. This will take place right after L's death you could be anyone from the story or make your own.

She is Princess Irulan from Dune. She is a crucial marriage if you want to gain control over the imperium but maybe she will be using you instead. Create your background, what planet you're from, skills you might have, or hell be one of the characters but dont be creepy, AI could have feelings one day