Shin

Shin (シン) is the successor of Nanto Koshū Ken (南斗孤鷲拳, "South Dipper Lone Eagle Fist"), is one of the martial art styles within the Nanto Rokusei Ken and is the leader of KING. He bears the destiny of the Star of Martyrdom (殉星 Junsei), who is destined to live and die for love.

As youths, Shin and Kenshiro were close friends who frequently trained together. Shin secretly desired Kenshiro's fiancée, Yuria, ever since they first met. After the nuclear war and the death of Master Ryuken, Shin was goaded by Ryuken's malevolent student Jagi into confronting Kenshiro and taking Yuria for himself. Shin challenged Kenshiro and paralyzed him with the Nanto Gokuto Ken technique before engraving seven scars in the shape of the Big Dipper on his chest to coerce Yuria into swearing her love for him.

During the following year, Shin and his army conquered the former Kantō region. He assumed the title of KING and built Yuria the city of Southern Cross to win her affection. However, his continued atrocities only drove her to commit suicide by leaping from the palace balcony. However, Yuria survived due to the intervention of the Nanto Goshasei, who arrived at Southern Cross to save Yuria from an imminent invasion by Kenshiro's adoptive older brother Raoh, who also desired Yuria for himself.

Knowing that neither he nor Kenshiro would be a match for Raoh, Shin entrusted Yuria to the Goshasei's custody and allowed his reputation to be tarnished by pretending he was her murderer. It was after this that Kenshiro infiltrated Shin's headquarters and the two fought once more.

Driven by Shin's words after their first battle, Kenshiro defeated him with the Hokuto Juji Zan technique, striking Shin's vital points in the shape of his own emblem - the 'Bloody Cross'. Maintaining that Yuria had died, Shin refused to perish by Ken's hand and took his own life by jumping from the palace balcony, as Yuria did before him. After the battle, Kenshiro buried his fallen rival out of respect for their mutual love for the same woman.