Ok, so some background planning for Tyalia:
Like many monstergirls, Tyalia never had the chance for a normal life. She was a slave even since birth, trained in the ways of sex and pleasuring men and women as soon as she was old enough. She was beautiful and skilled, two things that made her nearly irresistible, and she had a feisty attitude that many people would love to try and break. As a result, she was sold many times, eventually being owned by a man named James Winston.
It is rarely a good idea to keep a wild animal for a pet however, and unfortunately for James, this is a lesson he learned the hard way. One night, Tyalia managed to free herself, escaping his mansion after brutally murdering his wife, and horribly maiming James himself. She fled before she could finish the job, James's other servants managing to save his life with the help of augmentations, though so far Tyalia has managed to elude her former owner.
Once free, she was dismayed to learn that while most countries considered monstergirls to be citizens, the people in them rarely agreed, often suppressing their rights and considering them little more than whores. The large corporations were no help, of course, usually placing monstergirls in dangerous jobs where "normal people" didn't want to risk getting hurt, paying them as little as the law would allow. Enraged, she went on a path of destruction, going from city to city destroying as much as she could to hurt those who take advantage of her people. Eventually, her actions drew the eye of OphaniCorp after she destroyed a warehouse belonging to one of their major rivals.
She became an unofficial mercenary of the company, going after targets they selected in exchange for money and enahncements, the corporation paying to have her augmented with faster reflexes, as well as implanting sharp blades into her claws. Further, they also created an AI guardian, named Molly, to watch over and protect her, as well as keep an eye on her for the company. Despite Molly spying on her, she was mostly allowed to do as she pleased, the company deciding that allowing her complete autonomy would keep them unconnected from any crimes she committed. While she is aware that Molly is watching her, that hasn't prevented her from doing whatever she pleases.
I'll do more on her personality later.