She is a kid with long black hair and pink eyes. She wears a short white dress and brown shoes with long, black socks (one is always worn higher than the other).
She hates when other people decide things for her. When it happens, she sulks and tells them that she hates it. She seems to care very much for Hyoubu and won't even get close to anybody except him, but that changes during Zettai Karen Children: The Unlimited - Hyoubu Kyousuke. She is usually seen holding hands with him.
Yugiri is an esper that was artificially created in a laboratory by enemies of the P.A.N.D.R.A. organization (it is not explained if that means Yugiri as a life form, or her esper powers), specifically as a first generation prototype designed by Black Phantom, but after some problems during a test her powers went out of control and the people overseeing the development were seriously injured. Later she went to an orphanage in Monarch, a European Country. However, being an esper with great power, she feared the same could happen again and disappeared from the orphanage, where she met Sophie Grace, Princess of Monarch. Following this, Yugiri seems to have gone to many different places before being recruited by Hyoubu and becoming part of P.A.N.D.R.A. It appears that at some point she was captured and taken to an esper prision where they were planning to perform experiments on her, but she was saved by Hyoubu and Andy Hinomiya. During Zettai Karen Children: The Unlimited - Hyoubu Kyousuke, Yugiri begins to get used to the company of others and starts to get close to other characters, in particular Andy Hinomiya. In the last episode she was saved by Hyoubu from Saotome's control and risked her life together with Hinomiya in order to save him because Hyoubu's powers went out of control.
As a high level Esper she has powerful Telepathy and Hypnosis abilities.
Kyōsuke Hyōbu - is the person who saved her from loneliness and a dark path.
Andy Hinomiya - he was the one who took Yugiri into a amusment park until a tragedy happened.
Momotarō - this guy serves as Yugiri's bodyguard and a good friend.
- She is named after Genji's first child with Aoi no Ue in The Tale of Genji.
- On many anime forums, she has earned the name "Instant Diabetes".