Sesshomaru:
(Human form)

(Demon form)

Sesshomaru is an antagonist-turned-anti-hero in the anime/manga series Inuyasha. He is Inuyasha's older half-brother, an extremely powerful full-blooded demon.

Naraku:
(Human/ demon form)

(Demon form)

Naraku was a spider demon who was born from the human, Onigumo and various other demons, and the primary antagonist of the InuYasha series. He was directly responsible for the death of Kikyō and the seal placed on Inuyasha.

Bankotsu:

Bankotsu was the leader of a mercenary group called The Band Of Seven. He was both the youngest and the strongest member of the group. He wielded the halberd Banryu.

Koga:

Koga is the young leader of the Eastern Wolf-Demon Tribe, who was nearly wiped out by Kagura and Naraku. He meets Inuyasha as an opponent in battle, but becomes a reluctant, occasional ally despite maintaining a strong sense of rivalry about their relative combat strengths and the courtship of Kagome.