Kenshiro's initial adversary in the series, Shin was Kenshiro's friend and rival, who was taught in the martial arts style of Nanto Seiken, specifically Nanto Koshuuken (å�—æ–—å¤é·²æ‹³) or "Lone Eagle Fist of the South Star", whose practitioners are able to pierce flesh with their bare fingers. He had secretly fallen in love with Yuria, Kenshiro's lover and had slowly become insanely jealous. Jagi soon corrupted Shin, and convinced him to take Yuria for himself. Shin promptly challenged and defeated Kenshiro, then tried to convince Yuria to love him by wounding Kenshiro with his fingers, giving Kenshiro his distinctive seven scars in the shape of the Big Dipper. When Yuria finally gave in and said she loved him, Shin left Kenshiro for dead in the desert. Shin went on to amass an army to steadily conquer the land, under his flag of "The Bloody Cross", in an attempt to fully win Yuria's love. Ultimately, in her honour he built the city of Southern Cross. However Yuria, because of Shin's cruelty and ruthlessness, and her love for Kenshiro, never gave Shin her love. However, Kenshiro survived, and wandered the desert in search of Yuria. When he finally came face to face with Shin in the city of Southern Cross, he defeated Shin with the Hokuto Juuji Zan (北斗å��å—æ–¬) or "Cross-Kill of the North Star", to kill Shin with his "Bloody Cross" emblem marked on his chest. However, Shin confessed that Yuria had seemingly leapt to her death and, preferring to die by his own hand than by Kenshiro's, followed her down. Kenshiro took Shin's corpse and gave him a proper burial, saying that it was "because he loved the same woman as me".
Shin was recruited by the Foundation at a young age and became Sai's friend. Sai's training suppressed most of his memories of Shin but after meeting Naruto Uzumaki, who he notes to be similar to Shin, Sai's memories of him return, which brings a smile to his face.
He is the childhood friend of Tsubaki,and Tsubaki's first love.He disguise himself as a orian girl. In fact he is the number 1 orian girl in the district.
Shin is Lin's brother who proves to be more loyal to his friends than to the Red Dragon Crime Syndicate. He appeared in Session 25:The Real Folk Blues (Part One), where he assists Spike in a duel against members of the Syndicate. He is the one who informs Spike that Vicious has tried to seize control of the organization and was sentenced to death. Shin also states that everyone close to Spike is being hunted down. In Session 26: The Real Folk Blues (Part Two), Shin helped Spike raid the Syndicate base, but before they could take the elevator up to confront Vicious, he was shot and killed. His last words were that he was hoping for Spike to return and take over the Syndicate. (Source: Wikipedia)
Shin has an affinity for tortoises and plays the golden harp (or a harp-like instrument). He received the Shield of Genbu from Zeus (which is almost 3/4 his size and looks like the back of a turtle). Genbu is the Black Tortoise of the North (Winter). He is very close to Kirin no Judas and is very calm and quiet. He also has the ability to manipulate time but using such power has its cons. First, he needs a lot of energy and also his life is at risk. He used it once (when Gai and Maya called out to him on his mind for help against the wayward guardian angel)and he was unconscious for 1 whole week. His hair color changes from cyan to teal, long hair tied with a white ribbon (Judas gave it to him reasoning that playing the harp with a long hair must be hard), wears a black qipao (with long sleeves) outfit and white (changed to black at the second OVA) short boots. In terms of his age appearance on Earth, he is 21 years old and is 177 cm tall (5'8). Shin first appeared in the anime "Otogi Story Tenshi no Shippo" as an antagonist and groom of Ayumi, one of the twelve guardian angels of Goro Mutsumi in the anime. (Source: Wikipedia)