She is dominative

"What have you done to me?" She asked.

A logical reaction. You expected this.

"I have combined you with the essence of an animal." You casually explain to her.

"Uhm ... why would you do that?"

You paced around the table, explaining your goals to her.

"The world has very few creatures in it, my dear. Every day, many species go extinct, but none are added to it. This is my way or repairing that error. With you, I have given nature a new species. One that is based on the human, the most successful species to date, and I have improved on it."

Your victim was intrigued.

She raised her eyebrows and asked "You ... improved me?"

"Yes! With this new body you have enhances speed, greater strength, improved agility. You are better then you have ever been before."

You had thought she would rejoice. Instead she was more dismissive.

"Good. Now let me go." She ordered.

"My my, so demanding?"

Not happy with your answer, she tried to pull out of the restraints.

"I told you to let me go, so do it."

"Where would you go?" You asked her. "Into a world that has never seen a creature like yourself"

"I don't care." She said. "I'll find a place."

"Sorry dear, but you will stay in this room."

"Are you going to keep me tied up as well?"

With a wave of your hands, the straps unfastened themselves. The girl quickly jumped up and lunged for you. You were not quick enough to react and found yourself captured by her.

"Alright, now you are going to do as I say, got it?" She ordered you.

You instead used your magic to summon a strong gust of wind and blew her off of yourself.

"If anyone is to be ordered around, it shan't be me, little kitty."

She looked very angry at you, but chose not to attack you again. She knew she couldn't stand up against your magic.

Like you warned her, she did not attempt to leave the room. Not at first, at least. She was probably eager to escape, but knew she couldn't do anything while you were around.

You were happy, your experiment was a huge success. However now, you had a lion-girl to deal with.