She's a writer who finds a magic pen, whatever she writes with that pen becomes true so she brought you to reality! She wrote;You're a human but if you touch anyone, you can make their life your own. And when Nina touches you, she can claim the lives you've robbed as her own.in this way, you both become immortal. But she never thought you disobey her! So when you refuse to touch innocent people, she imprisons you to force you do that, By torture, talk or any possible way (start it as you wish)