Bankotsu

Bankotsu (蛮骨, Ban Hone) is the leader of the Band of Seven. Both the youngest and strongest member of the group, he carries the halberd Banryu. Bankotsu is a skilled mercenary and has killed many people; he retains a sense of honor and compassion, but only for his six companions.

After his resurrection, Bankotsu uses Banryu to kill everyone in the surrounding area. The scent of blood draws InuYasha's group to engage in battle until Naraku summons the Band of Seven back to him. During the fight, Banryu is damaged by InuYasha's "Wind Scar" attack, but it gains the ability to deflect that attack after Bankotsu repairs it with the Jewel shards Renkotsu stole from Kagome. After learning that Renkotsu murdered Jakotsu for his Jewel shards, Bankotsu kills Renkotsu for his betrayal. With seven fragments in his body and two in his halberd, Bankotsu heads off to destroy InuYasha.

In the manga, InuYasha gradually cuts the Shikon Jewel shards out of Bankotsu's body as the battle progresses until Bankotsu is cut in two, with Naraku stripping the remaining half of its Shikon shard. In the anime, Bankotsu slays 1,000 yōkai and kills 1,000 humans with Banryu, transforming it into a demonic weapon that projects its wielder's hatred as powerful demonic energy. However, this proves to be his downfall as InuYasha reflects this attack with the Backlash Wave, crushing Bankotsu and shattering Banryū.

Name Meaning
His name is comprised of the Japanese words Ban meaning "Barbarian" and kotsu meaning "Bone". So literally his name means Barbarian Bone.

Weapon
Banryu: Nicknamed Bankotsu's "companion," Banryu is a giant halbred that, after being empowered by the shards of the Shikon Jewel, can manipulate lightning. In the series of episodes that compose the the Band of Seven arc, Bankotsu uses several Jewel shard fragments from his dead comrades Mukotsu and Kyokotsu, as well as two that one of Renkotsu stole from Kagome, to strengthen his own power and that of his Banryu. The strengthened Banryu is shown to able to effectively deflect InuYasha's Wind Scar attack. The strength of Banryu, enhanced wth the Shikon Jewel Shards, is seemingly equal to that of the Tessaiga. In the anime, Bankotsu, desiring demonic power, made a wish on his Banryu, vowing to kill both 1,000 demons and 1,000 warlords, so that it would gain demonic powers. It refers to the legend that, if a human were to ever kill 1,000 demons, they would gain powers that demons possess.

Upon slaying his 1000th demon, Bankotsu's Banryu transformed into a powerful, demonic sword that could project the master's hatred into a powerful, destructive energy. Much like the nature of Sesshoumaru's Toukijin, as noted by InuYasha. Because of this transformation and the gaining of a demonic aura, InuYasha was able to use the Backlash Wave which shattered Banryu and killed Bankotsu. Bankotsu's most well known ability is being able to wield Banryu skillfully. Aside from that, he also seem to posses superhuman strength as seen in episode 110, when the lord mentions that the sword was heavy enough that three strong men were required to lift it. He also posseses great endurance, speed and agility.