Dr. Hu is one of 
characters. Here is the Character sheet he has for her. 
Character Sheet: Dr. Hu:origin()/pre00/5dad/th/pre/i/2018/064/7/7/dr_zhi_hu_by_master_geass-dc4eau9.png)
Name: Doctor Zhi Hu
Race: Human
Gender: Female
Orientation: Straight with some bisexual tendencies
Age: 35
Eye Color: Hazel
Hair Color: Black
Height: 5'4"
Cup Size: C-cup
Relatives: TBD
Powers: Magical Arts
Occupations: Doctor, slave, medical researcher, witch
Description: Zhi Hu was a bright girl born to a loving family of below-average income in China. Following the passing of her grandmother to an inoperable brain tumor, she developed an interest in medicine, soon becoming her passion.
As she struggled to save for college, she was given an offer by Lilly to pay for her tuition and expenses. She was then able to devote herself to her studies, as well as the occasional fling. Graduating in the top 10 of her class, she interned at a major hospital. However, much to the surprise of her family and colleagues, she turned down offers for a permanent position. Instead, she dropped off the face of the Earth, quite literally.
Dr. Hu then moved to Trivium,