Yiyi Xu

Yiyi Xu (徐依依, Shū Īī) is a Chinese female character of Hello World and its anime spin-off Another World. She is a professor and a scientist at Alltale Management Facility and colleagues of Tsunehisa Senko and Katagaki Naomi.

Personality
Yiyi Xu is a serious and hardworking person and friendly towards her fellow workers. She loves to follow rules although Professor Senko 's work habit rubs her eventually and in certainties follows his example. Just like when their group decided to throw a barbecue party at the facility hall at the time when the security guards are not roving their area. She has a habit of intruding someone's room and to make a 360 degree cleaning.

When she gets worried, Yiyi frequently speaks on her native tongue, the Chinese language.

Appearance
Yiyi Xu has purple eyes and shoulder length black hair and skinny physique. She frequently wears red lips sticks, red long sleeve polo, jet black skinny jeans, red sandals and white researcher coat.

Summary
Yiyi Xu is a professor and scientist at Alltale Management Facility ever since 2027. She became a vital part of the research group even when Katagaki Naomi joined. Although not in par with Naomi's abilities, Yiyi exceeds on her role on supporting him and Tsuneki as much as she can.

Yiyi Xu is one of the 5 person who manually shut the Homeostatic System down in order to stop its rampant activity.