Jin Chonrei/Story

Past
Chonrei is the older twin brother of Jin Chonshu. When they were six, they lost their parents to an epidemic around their home. Before their father died, he spoke of Qin Wanglong (秦王龍) AKA Jin Ouryuu, one of their family's ancient ancestors. Wanglong/Ouryuu was a celebrated general of the great Qin Shi Huang and was said to have single-handedly slayed a thousand soldiers. Their father convinced them that they had the same blood of this warrior and soon passed away. Left to fend for themselves, the brothers worked together to support themselves and live up to their family name. As they grew older, they also began to detest other people. When they were fourteen, an attack from bullies left them in a half-dead state on the streets. Once they lost consciousness, two spirits of their 2200-year-old ancestors possessed their bodies. The spirit that possessed Chonrei was known as Qin Konglong (秦空龍) AKA Jin Kuuryuu, making the boy a strong combatant while also heightening his brutality further. The spirit that possessed Chonshu was Qin Hailong (秦海龍) AKA Jin Kairyuu, who was Konglong's younger brother. Konglong/Kuuryuu and Hailong/Kairyuu were the sons of Wanglong, who wrote the Jin scrolls during the Qin Dynasty. They now seek to gather all three scrolls, which they believe will resurrect them in immortal bodies and allow them to conquer the world. However, this goal is seen as a delusion.

Fatal Fury 3: Road to the Final Victory
The two brothers know that the scrolls are in South Town and sends Ryuji Yamazaki to search the city, but several other characters are also searching for the scrolls for different reasons. If the player did well throughout the course of the game, and defeats Chonshu, Chonrei will appear and becomes extremely angry at the defeat of his younger brother, promising that the player character will not leave the place alive. Following the brothers' defeat, their ancestors' spirits depart from their bodies.

Real Bout Fatal Fury
Geese Howard ends up collecting all three scrolls but orders Billy Kane to dispose of them in the backstory of the next game, Real Bout Fatal Fury. In endings where either Chonshu or Chonrei defeats Geese, the brothers recover the scrolls. Yet despite Chonshu's objections and questioning, Chonrei angrily tears them up to defy the deluded will of their ancestors. The twins continue their lives as normal children under Tung's wing, especially with Chonrei's Real Bout 2 ending involving him being the sole pupil training under Tung in both of their endings (while Chonshu prefers to take his route under Kim's wing instead).