He is the successor of Nanto Suichou Ken (南斗水鳥拳, "South Star Waterfowl Fist"), which is said to be the most elegant of the Nanto Seiken styles, and represents the Star of Justice (義星, Gi-sei). While away on training, his home village was attacked by a "Man with Seven Scars" (who was actually Jagi imposted as his brother Kenshiro), who killed Rei's parents and kidnapped his sister Airi.
Rei later accompanied with Kenshiro in a quest to taking back his sister (who's later being sold as slave). after Jagi is defeated and knowing the truth about "Man with Seven Scars", Rei later became a close friend with Kenshiro and helped him in a quest to find his lost adopted brother, Toki.
Known moves
南斗虎破龍 (Nanto Ko Ha Ryuu)
Places the opponent in a temporary death-like coma. Rei's counterpart to Kenshiro's Hokuto Ryuu Geki Ko.
飛燕流舞 (Hien Ryubu)
An aerial technique that uses the air to slice through objects.
