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 huge Banryu halberd. 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, 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 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 warlords 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
Ban and kotsu means "Barbarian" and "Bone" adding them up as "barbarian bone".

Weapon
Banryu: Nicknamed Bankotsu's "partner," Banryu is a giant halbred sword 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, as well as two that one of his comrades (Renkotsu) stole from Kagome, to strength 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 strength, made a wish on his Banryu, vowing to kill both 1,000 demons and 1,000 warlords, which refers to the legend that, if a human were to ever kill 1,000 demons, they would become a demon, themselves.

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's backlash wave, later on, is able to reflect Banryu's demonic attack, destroying Bankotsu, and shattering Banryu.

Abilities
Bankotsu's most well known ability is being able to wield Banryu skillfully. Aside from that, he also seem to posses superhuman strength, endurance, speed and agility.