The Band of Seven
Before he became leader of of the Band of Seven, Bankotsu traveled with his good friend, Jakotsu. The two companions faced off strong humans and demons. At some point during his travels, he came across, the powerful half-demo, Naraku, who told Bankotsu about the Shikon Jewel. Afterwards he allied himself with fellow warriors Renkotsu, Jakotsu, Suikotsu, Ginkotsu, Mukotsu, and Kyōkotsu to form would become the Band of Seven.
Armed with demonic halberd, Banryu, Bankotsu led the Band of Seven and they became the most infamous gang of mercenaries throughout the land. They were hired by warlord after world to dispatch their enemies. However, the last warlord who hired felt that they were too powerful and sent his men to hunt them down. While the seven mercenaries put up an impressive fight, they were eventually captured and beheaded.
Battle with Inuyasha
A decade later, the Band of Seven was resurrected by Naraku with the power of the Shikon Jewel Shards. After being resurrected, Bankotsu took his position as leader of the Band of Seven. He also took the life of the warlord to murdered him and retrieved his weapon, Banryu. Afterwards, the Band of Seven went on a killing spree and the scent of blood attracted Inuyasha and he and his friends engaged the Band of Seven in battle. During the fight, Bankotsu's Banryu was heavily damaged by Inuyasha's Wind Scar. Banktosu repaired Banryu with Shikon Jewel shards that were stolen from Kagome by Renkotsu, however he killed Renkotsu when he found out that he killed Jakotsu for his jewel shards. Afterwards he sets out to find and kill Inuyasha.
Final Battle on Mt. Hakurei
Inuyasha and Bankotsu eventually clash again in the caves of Mt. Hakurei where Naraku was creating himself a new body and Bankotsu was in charge of protecting him. The two fought furiously in a battle to the death with Bankotsu surpassing Inuyasha in both weapon skills and hand-to-hand combat, but the half-demon continued to fight despite being completely outmatched. However, before they could continue their battle they were surrounded by a hoard of demons. As Inuyasha killed the demons to survive, Bankotsu only killed them to add to his 1000 demon record. He succeeded and the wrath of 1000 demonic lives increased Banryu's power.
Inyasha and Bankotsu continued their fight with the Tessaiga barely holding its own again the demonic halberd, which Inuyasha noted that its power resembled that of Sesshomaru's sword, Tokijin. Bankotsu continued to battle Inuyasha as he revealed what happened when he first met Naraku, how he came to know about the Shikon Jewel, and how he placed power in to his Banryu by making a wish on it of absorbing the wrath of 1000 warlords and 1000 demons, making a total of 2000 lives. Inuyasha comments that Banryu is surrounded by a demonic aura and that it would best for Bankotsu to get rid of it, only for Bankotsu to respond "Go to hell, half-breed!"
Bankotsu manages back Inyasha into a corner and utilize his Hatred Ball to finish him off. However, due to Banryu producing a demonic aura Inuyasha was able to use his Backlash Wave to send Bankotsu's attack back at him, finally defeating the proud leader of the Band of Seven.
Bakotsu was a young man who enjoyed killing both humans and demons. However, despite his blood lust, he possessed a sense of honor.
Skills and Abilities
Bankotsu was incredibly power warrior who was able to hold his own against powerful humans and demons.
- Enhanced Strength: Bankotsu possessed incredible strength. He was able to wield the extreme heavy Banryu with one hand where to took three men to just lift it off the ground.
- Hand-to-Hand Combat Skills: Bankotsu was also skilled in fighting barehanded. This was shown when he was facing Inuyasha one-on-one and was able to nearly beat him with his bare fists.
- Banryu: Bankotsu was known for his use with powerful halberd, Banryu. The weapon rivaled Inyasha's Tessaiga in both size and strength and only became stronger due to it being empowered by Shikon Jewel Shards and the wrath of 1000 human and 1000 demons. Banryu possessed the ability to manipulate electricity and turn the wielder's hatred in to demonic energy.