Experiment ruthlessly on her

You thin your mouth as you glared at Lina. Thinking of Yu, you thought of another interesting idea you want to try. Totally not because what she said upset you.

"Speaking of Yu, there is another experiment I wanted to do, but I wanted to see if I can surprise Yu with it." You started explaining when Lina cut you off.

"You've kind of already exposed the kind of person you are. Why are you still pretending?" She said in a bored tone looking at you. "If you're going to do it anyways, stop making excuses for yourself and just admit you're an asshole."

You grit your teeth but took a breath just to calm down. You were not going to lose your cool over this girl who is powerless.

"I'm explaining it so you can understand where this is coming from." You said, holding down your temper. "But since you're in such a hurry, listen. Everything that was changed about your identity as Lina is now removed." Lina's eyebrow raised questioningly, but before she can even make a sound, you continued.

"Since I own your identity and can change it however I want, I want to see how far I can use it without someone else realizing it has been changed. From now on, your identity is of an invader that has completely taken over Lina's mind and body, but is completely loyal to me."