Shachi is the son of Akashachi, the pirate. Shachi was left behind in Asura after Akashachi fled during an attack and there he became romantically involved with Leia, a local girl. He became Jukei's fourth student and learned Hokuto Ryūken to protect Leia. He began fighting against the Asuras, eventually earning a reputation as "Rakshasa". At first, he only teams up with Ken to use him in his plot to destroy the three "Rash�", allowing Lin to be captured by Kaioh so that Ken would fight him. After he is reunited with Akashachi before his death, Shachi becomes a loyal ally to Ken, sacrificing his left eye to Hyoh so that Ken would not be captured. He helps Ken restore Hyoh's memories, but later dies after being mortally wounded while fighting against Kaioh himself. (Source: Wikipedia)
Kuro-Yasha is a short dwarfish man who worked as a servant of the main Hokuto bloodline. He wields two long claws in battle. He assists Kenshiro and Hyoh, but dies fighting Kaioh's elite army. (Source: Wikipedia)
Lin's twin sister. The Celestial Empress (天�, Tentei). Only one of the children was permitted to live, but Falco could not bring himself to kill Lin and instead left her in the care of his aunt and uncle. Lui is kidnapped by Jakoh and locked underground in the Imperial Palace as a means by Jakoh to blackmail Falco, her protector. Bat, Lin and Ein sets off to the Imperial Castle to free Lui, while Kenshiro is fighting Falco. When Lin meets Lui for the first time, she learns the truth about her parentage. After Lui is freed, Falco turns against Jakoh and kills him.
Jukei is the Hokuto Ryūken master who trained the three Rash� and Shachi. In the past, he went through a demonic possession as a result of his misuse of his style, killing his wife and child, but was rescued by Ryuken. He then trained Kaioh and Hyoh, sealing Hyoh's memories of Kenshiro and his knowledge of the original Hokuto style. In the present, he forms part of Leia's resistance and attempts to undo the seal, but gets killed in the process. (Source: Wikipedia)
Leia's younger brother. He looked up to Shachi as his idol and joined the Asuran training camp against his sister's wishes to follow in Shachi's footsteps. Tao deserted the training camp when he was ordered to kill a friend in combat. (Source: Wikipedia)
The most mysterious of the Gung-Ho Guns. His portrayal in both the anime and manga are drastically different. In the anime, Zazie uses the identity of a young boy named "Beeb" as a disguise. He can control sand-worms with a high-frequency device he wears on his head. The anime never exactly gives a clear explanation as to what Zazie was. It can be theorized that Zazie was a malevolent entity that took control of the boy whenever it needed to, that he was in fact a much older man who only looked like a young boy, or that he was actually a child assassin driven to the brink of insanity by his association with the Guns. In the manga... his body is controlled by a collective of group-minded insects. These insects are the original inhabitants of the planet Gunsmoke and have formed an alliance with Knives to see whether humans or Plants are better to co-exist with. The insects that form Zazie also seem to represent the planet's consciousness, as represented by the sandworms he can control as well (Zazie has been referred to as the 'leader of the sandworms' by Knives). His body is destroyed by Hoppered for spying on him and Midvalley. Zazie later reappears in the body of a teenage girl. In Trigun Maximum 11 this body is destroyed as well after trying to implant an insect in Knives to control him. Zazie reappears one last time as an odd-looking man in disco-clothing in order to deliver his coin to Vash. It is revealed that these bodies are human, but are controlled by a small worm-like creature that lives inside it, similar to the one Zazie tried to implant in Knives. When the hive is destroyed by Knives, the man spits out the creature and has no memories of his time as host to Zazie. His Gung-Ho Gun number is 12 in the manga, and 4 in the anime. (Source: Wikipedia)