Renkotsu

was a killer who was also a member of the Shichinintai. An expert military engineer and pyrotechnic, he created explosives and incendiary devices, including a type of flaming oil that he could spew from his mouth. He also reconstructed Ginkotsu into a living artillery weapon resembling a modern tank. He was also a gifted strategist and had some skill at hand to hand combat, although the only members of the group he surpassed in hand-to-hand fighting skills were Mukotsu and Kyōkotsu. One of the most dangerous members of the Band of Seven, Renkotsu was second in command after Bankotsu.

Renkotsu's distrust both for Naraku and for Bankotsu's tactics (which were, in Renkotsu's eyes, simply killing off the Shichinitai a second time) eventually led him to betray Bankotsu by collecting some of the Band's Shikon shards and challenging him, only for Bankotsu to kill him for killing their mutual comrade Jakotsu.

History
Fifteen years before the series began, the Shichinintai took a job for a lord. They were soon betrayed by the lord due to the Shichinintai being considered too dangerous to exist. They fled into the mountains, but they were soon captured and executed. Suikotsu and the other Shichinintai members would then be revived when Naraku would give the leader Bankotsu seven Sacred Jewel shards.

During the story
Renkotsu had taken over a Buddhist temple after burning all of the monks inside to death. He wore the robes of the head monk in order to conceal his scent of corpses and graveyard soil. He then took Inuyasha and his poisoned friends in after his battle with Ginkotsu and gained their trust. Later, after Ginkotsu attacked Inuyasha at the temple, Renkotsu set the temple with Inuyasha's friends in it on fire, but not before stealing Kagome's Shikon Jewel Shards. He was spared by Inuyasha, and he and Ginkotsu regrouped with the Band of Seven.

He reworked Ginkotsu into a tank, and then along with Jakotsu and Ginkotsu, collected Suikotsu. When reunited with Bankotsu, he was forced to give up the shards he stole from Kagome. Bankotsu promptly threatened Renkotsu with death if he kept more shards for himself. Renkotsu appeared later with Ginkotsu, fighting Kōga. They gained the upper hand at first, but Kōga caused Renkotsu to fall from Ginkotsu's back after critically injuring him. Ginkotsu, angered, unleashed all of his artillery upon Kōga. Kōga defeated him, but Ginkotsu self-destructs and used his Shikon shard to protect Renkotsu (in the manga, Kōga stuffed Renkotsu's armor into Ginkotsu's cannon, causing it to explode). Renkotsu used Ginkotsu's shard to heal his wound, despite knowing Bankotsu would kill him for doing so; his justification for this was that he would do anything to survive. Because Bankotsu's orders continued to send various members of the Band of Seven to their eventual deaths while returning their jewel shards to Bankotsu, Renkotsu used this to justify his plan to betray Bankotsu.

He then attacked again by trapping Inuyasha, Kagome, Kōga, and Kōga's followers into a cave. He defeated Inuyasha, and prepared to cut out Kōga's jewel shards, but then was handily defeated by Inuyasha's timely appearance. Later, after Inuyasha entered the barrier surrounding the Band of Seven's fortress and became human, Renkotsu chased him and toyed with the helpless Inuyasha. Inuyasha slipped through a crevice just as Jakotsu arrived; knowing Jakotsu had an obsession for killing Inuyasha, Renkotsu sent him after the half-demon, hoping the two would destroy each other. His reason for this wass that Jakotsu was too loyal to Bankotsu to join his betrayal, and he needed Jakotsu's shard. Renkotsu observed the battle and removed Jakotsu's jewel shard after he was defeated by Inuyasha, apologizing to Jakotsu. With three jewel shards, he challenged Bankotsu, but dies after Bankotsu, deeming him a traitor, took all of the jewel shards out of Renkotsu.

Personality
Arguably the most cunning and intelligent member of the Band. Ultimately though, Renkotsu's cunning leads to his downfall, as it causes him to betray Bankotsu for his own survival. Bankotsu admits that Renkotsu might have been able to usurp him if he didn't hesitate so often to figure out the details of his plan, remarking, "For being the smart one, you sure can be stupid."

Unlike the other members, He rightly mistrusted Naraku (although the two never met face-to-face).

Renkotsu is easily as ruthless as Bankotsu, being willing to slaughter children in order to remove the "distraction" to Suikotsu's doctor personality, and being willing to sacrifice Jakotsu's life in order to gain another Jewel shard. However, like Bankotsu he has some regard for his teammate's lives, shown by his strong sense of camaraderie and concern for Ginkotsu and (to a lesser extent) Suikotsu. Ultimately, his decision to turn against Bankotsu was a combination of his strong survival instincts and a feeling that Bankotsu was sacrificing them needlessly in Naraku's service, to no point and purpose other than Bankotsu gaining further power.

Physical description
Renkotsu was bald, which was thought to be because it was said he was once a monk/priest (In support of this theory, he was able to write). He had tattoos upon his face which stood for Deception; he was apparently able to conceal these tattoos at will. He usually wore armor and a bandanna. His original armor consisted of a blue undershirt with a reddish-orange armor, but after his battle with Kōga, in which much of his armor was torn off, Renkotsu adopted a new outfit with a black undershirt and orange armor with a flame-like design, though he retained his blue bandanna.

Powers & Abilities
Although not a formidable melee fighter like Bankotsu, Jakotsu or Suikotsu, Renkotsu more than made up for his lack of combat skills with his advance weaponry. He was a master of, , and. He uses a variety of fire-based weapons, including "steel" strings that light on fire,, and. He can also breathe fire by drinking a special oil and spitting it from his mouth (No explanation was given as to how the oil was lit, as it came from his mouth as fire). He also has a wooden wheelbarrow that he uses to carry his artillery after Ginkotsu's death. It is his inventive and engineering skills that allow him to rebuild Ginkotsu after his original body is damaged beyond repair.

Renkotsu is skilled in stealth and strategy; he is usually in command if Bankotsu was engaged in other matters. He is also the only member of the Band besides Bankotsu who knows how to write. After Ginkotsu's demise, Renkotsu relies upon himself to take arms against his enemies, carrying a load of them in a cart.

Weapons

 * Fire Gourd: Renkotsu has a gourd attached to his wrist which has an extremely flammable liquid inside of it, which he drank, then spits out as flames. This is his most commonly used and simplest weapon.
 * Fire Wire: Renkotsu haw wires which he wields with his fingers. He can set them on fire instantaneously and use them to bind his opponents.
 * Fire Net: With his fingers interlaced, Renkotsu can make the wires form a net to keep the target from escaping by leaping/flying.
 * Fire Whip: Renkotsu can use a single Fire Wire as a whip.
 * River of Flames: Not really so much of a technique as a strategy, the idea of this strategy was to catch Kagome and Kōga at the foot of the mountain of the spirits. Renkotsu threw oil on the river (After making a dam from rocks dislodges by explosives) and then set fire to it, forming a layer of fire on the river. Renkotsu's backpack contained canisters of oil and lighting devices for this purpose.
 * Flamethrower: A pump-like device that launches a whirlwind of fire from it by pushing a pump in the back.
 * Bazooka/Cannon: A weapon of Renkotsu's that fires by pressing switch/button.
 * Gatling Gun: Another of Renkotsu's weapons that can fire light explosive rounds in quick succession.
 * Explosives: Renkotsu uses various types of explosives such as bombs, dynamite, etc. which were carried in his backpack.
 * Lighter: Renkotsu also carries a small lighter to act as a flint for his incendiaries.
 * Knife: Renkotsu is, besides Mukotsu, the only member of the Band of Seven who never displayes hand-to-hand combat skills. However, he is shown to carry a long knife in his belt, which he intendes to use to remove Kōga's shards. This, his agility, and the fact that he killed all the monks in the temple without his firepower, suggests he had at least basic knowledge of hand-to-hand combat.
 * Sensor: He uses a small sensor to put certain people to sleep. It works at a rather fast speed, knocking out both Kagome and Shippō in seconds.

Manga vs. Anime

 * The anime first shows Renkotsu approaching a temple, and preparing to kill the monks inside after letting them know that he is one of the resurrected Shichinintai. This is not shown in the manga. Instead, Rekotsu is first introduced after he has already taken control of the temple to disguise himself.
 * The anime takes the confrontation between Renkotsu and Bankostsu further after the former took Jakotsu's jewel shard. Bankotsu returned the two shards he took from Renkotsu and challenged him, laying Banryū aside. Suddenly, unnerved despite having the shards, Renkotsu hesitated, and Bankotsu attacked. It was immediately clear that Renkotsu's combat skills were completely inferior to Bankotsu's; panicking, he unleashed his artillery and his flame gourd, but it barely held Bankotsu back. Bankotsu threw Jakotsu's hairpin and hit Renkotsu in the chest, paralyzing him and knocking out one of the jewel shards. Angrily, Renkotsu screamed at him, "How is what I've done any different from what you've done?!" Bankotsu ripped out his other shards in response; as Renkotsu crumbled into a skeleton, he answered, "The difference is... I would never betray my friends." The fight between the two does not happen in the manga. Instead Bankotsu removes all the jewel shards from Renkotsu's body as soon as he reveals that he knows of his betrayal.

Trivia

 * Renkotsu's Theme-Music from the InuYasha Official Soundtrack, Vol. 3 is entitled "The Evil Renkotsu".

Media appearances
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Manga

 * Chapter 240
 * Chapter 241
 * Chapter 242
 * Chapter 243
 * Chapter 244
 * Chapter 246
 * Chapter 247
 * Chapter 248
 * Chapter 249
 * Chapter 250
 * Chapter 251
 * Chapter 252
 * Chapter 253
 * Chapter 254
 * Chapter 259
 * Chapter 260
 * Chapter 263
 * Chapter 264
 * Chapter 265
 * Chapter 267
 * Chapter 268
 * Chapter 269
 * Chapter 270
 * Chapter 271
 * Chapter 272
 * Chapter 276

Anime
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 * Episode 103
 * Episode 104
 * Episode 105
 * Episode 106
 * Episode 107
 * Episode 108
 * Episode 109
 * Episode 110
 * Episode 111
 * Episode 112
 * Episode 114
 * Episode 116
 * Episode 117
 * Episode 118
 * Episode 119
 * Episode 120
 * Episode 121
 * Episode 122
 * Episode 123
 * Episode 163