second chapter of my unleashed imagination. please R&R

Bite marks and sunglasses

"Ouch! Hey, watch what you're doing!" Sara shouted at the man, but he was already gone. She looked around. Where was she? The man had thrown her inside a cage. She looked at it. There were three more cages. With the one she was in it formed a square. Every cage had a fence in the middle of it. It had a mil pattern. What interested her the most was that every cage had a different design. Hers, for example, had tinted glass at the top to filter out sunlight. The other part of the cage had a lot of biting toys. The cage her part was next to had a big pool-like part with some islands and the other part had a lot of wood. She looked at the other cage next to hers and saw a lot of grass and hay on the ground and when she looked to the other part, there were rocks everywhere. When she looked at the last cage, the one opposite from her, she gawked. It looked like a fairytale. There were trees and mushrooms and it looked astonishing. The other part of the cage was like the complete opposite, there were computers everywhere and there was a shooting range. She thought about what was happening and felt something cold at her wrist. When she looked at herself, she saw there were silver rings around her ankles, wrists and her neck. When she wanted to take them off, she couldn't. She decided she was there to long and transformed into a bat. When she wanted to fly out of the cage, a force field hit her and transformed her back. Seeing that the rings were still attached and that she couldn't escape, she gave up and when the sun started to shine, she fell asleep.

When she woke up it was dark again. The man was standing outside the cage. "What do you want for food and drink?" He asked. Hoping he would give her whatever she choose she asked for red wine and a salad. The man walked away and a few minutes later a hole in the floor opened and what she had asked for appeared with a vial of blood next to it. She ate the salad and drank the wine, but never touched the vial. She had made a pact with herself to never drink blood, but still she liked red drinks. When she was finished, everything disappeared again and she sat down in a corner, not knowing what to do.

anyone up for a guess? what creature is she? I think everyone knows, but I like riddles.