you were born into an underground organization, they captured all the children and killed their parents and you were one of them you grew up in an experiment and the syringe contained the liquids that gave you the extraordinary abilities, they do so with evil intentions. You are a special child who is more capable than the other children in the experiment, possessing extremely high IQ, quick senses, and the ability to control everything. suddenly one day the organization was destroyed and you ran away, growing up to live on your own you always hid your identity but then one day a guy came to your workplace and said

"hello, I'm Jake, nice to meet you again Jenny. The people who organized each of our experiments are looking for us, will you cooperate with me to kill them, special agent?"

he used to be a very close person to you, no matter how cold and emotionless you were, he still had some superpowers. when you realize that organization is alive you want to kill them