

After Kōga became wounded and lost one shard in his right arm, Kagome allowed him to flee despite Inuyasha's protests. After discovering that Kagome could sense Shikon Jewel shards, Kōga kidnapped her in order to have her find the Bird of Paradise which possessed a sacred jewel shard, and through her cooperation, Kōga eventually falls in love with her, though his feelings were one-sided. Upon finding out that Inuyasha killed his underlings, Kōga and Inuyasha immediately develop a rivalry with one-another, despite the fact that Inuyasha is a fellow canine. After mercilessly killing the other wolf demon and taking back the stolen shard, Kōga left his wolves to eat the villagers, but they called him back when Inuyasha started to slaughter them.

The wolf demon thief took refuge in a hut that belonged to Rin (who later becomes Sesshōmaru's companion). Kōga is first seen pursuing and killing a wolf demon who betrayed him by stealing a sacred jewel shard from him. It also seems that he has a solid, possibly long friendship with Ginta and Hakkaku. It seems that he is the youngest leader of the Wolf Demon Tribe, and he once saved a younger Ayame from the Birds of Paradise and promised her that he would take her as his wife, though he later denies that this incident ever occurred. Not much is known about his past before he meeting Kagome and her friends.
