Hei's younger sister. Pai is the Contractor responsible for the disappearance of Heaven's Gate five years prior to the story's setting and had since vanished. Her name means white in Chinese, while Hei means black.   ~!The Messier code BK-201 belongs to her star. Pai's abilities are said to be vast, with generating abnormal electricity as only the tip of the iceberg. In addition to this, she also has the power of molecular reconstruction. Her remuneration is to sleep.   At the time of the Heaven's War in South America, Hei was constantly together with Pai during their many operations, acting as a bodyguard of sorts. It was for Pai's sake that Hei originally joined the Syndicate. When the Heaven's Gate disappeared, Pai's power became Hei's, because—according to Amber—she continues to exist within him. Hei himself remains oblivious to the fact, until the very end. Her real name is revealed at the end: Xing (which may in this instance mean "star".)!~

In Tokyo, an impenetrable field known as "Hell's Gate" appeared ten years ago. At the same time, psychics who wield paranormal powers at the cost of their conscience also emerged. Hei is one of the most powerful of these psychic agents, and along with his blind associate, Yin, works for one of the many rival agencies vying to unlock the mysteries of Hell's Gate.
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(Source: Anime News Network)

__Height:__ 160 cm

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**Non-anime roles:**
• Robin - Honkai: Star Rail (VG)
• Tsukishiro Yanagi - Zenless Zone Zero (VG)

Voice actress affiliated with ADV and FUNimation productions

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Taking place after the events of Darker than Black and replacing the events Ry&#363;sei no Gemini completely, Hei (BK201) and Yin return to Tokyo to investigate how a Black Dandelion is granting Contractor-like powers to people who come in contact with it.