Koga

Kōga (鋼牙, "Steel Fang") is the major supporting character of anime series, Inuyasha. He is the young leader of the eastern yōkai-wolf tribe, or the Yōrō clan, which is nearly wiped out by Kagura and Naraku. He first meets Inuyasha as an opponent in battle, but later becomes a reluctant, occasional ally despite maintaining a strong sense of rivalry with the 'useless mutt' about their relative combat strengths, as well as Kōga's persistent courtship of Kagome.

Although Kōga often flirts with Kagome, it is later revealed that he has promised Ayame, another wolf demon, to make her his wife. Later, Kōga tries to get Ayame to give up her pursuit by saying he will only marry someone who can sense sacred jewel shards. These events don't happen in the manga because Ayame is an original character made especially for the anime. Kōga married Ayame and became the new chief of the wolf demon tribe.

Kōga is introduced in the series with three Shikon shards in his possession; two embedded in his legs and one in his right arm. He loses the shard in his arm very early in the series, and the shards in his legs are eventually taken away from him by Naraku, gravely weakening him. After Kikyō's death at Naraku's hands, Kōga decides to parts ways with Inuyasha, Kagome, and the rest of the group, leaving the battle with Naraku up to them. He also tells Kagome that she may leave Inuyasha and come to him at any time.