Nyu

When Nyu was a child, she loved to play in the forest. this was back when she was a normal tabby cat...well, not normal, she could use the mana in the air for magic and her fur was bright green like the pine trees. But when she turned 16, a  strange group of men approached her in the forest one day while she was sitting by a lake. She noticed they were all wearing knight's armor and thought they were just a bunch of friends coming home from something, so she waved to them and called out a greeting. The four men approached her, and as she raised her hand to wave hello, the leader struck her in the jaw, breaking it. The four then proceeded to rape her multiple times, before deciding to take her back to the castle. They went through a tree which was actually a disguised portal which led them to the castle of a powerful wizard, who treated Nyu like a play-thing, conducting all sorts of experiments. The worst of which left her as a slimy goo-girl with no memory of her past life, telepathic ability, and the capability to only speak the name he had given her due to the sound she made whenever he grabbed her ears or tail which was quite often.

When she turned 18, while sitting in her chains, waiting for the master to return, the door exploded inwards and a group of soldiers rushed in. They were knights as well, bnut different, and as they freed Nyu, one of the knights took his helmet off, revealing a black wolf with ten tails as the wizard came back. The res tof the knigghts were slaughtered right off the bat, but the wolf knight not only destroyed the castle, the creations, and the magical seal keeping Nyu under the wizard's control, but he killed the wizard, freeing a great many people from his tyranny.

He left after that, and she was left to roam the countryside by herself and learn