The Humani Chronicles
Corinne na Revais
A slave since birth, Corinne is given to Tobias Revais on her thirteenth birthday. She endures years of abuse until he changes his ways. After finding out Tobias has figured out how to summon the Humana and obtain a power, she uses the research to gain a power over time.
In Time Wielder, she uses her power to try to stop the teshak from becoming enslaved. As her attempts fail, she starts gaining more and more powers until she fancies herself on level with the Humana.