Name meaning: Steel Fang
Biographical information
Age: Unknown (Appears 15)
Physical information
Species: Wolf Demon
Gender: Male
Height: 5'10" (176 cm)
Eye color: Blue
Hair color: Black
Skin color: Tanned
Quote(s)
Inuyasha: "Wha- Did you just call me a mutt?!"
Koga: "You're right, that'd be an insult to canines. You smell much worse!"
Appearance
Kōga has blue eyes and black hair that is always tied up into a ponytail with a brown cord. He wears a brown wolf pelt. He has a tail that is like a bushy wolf's tail, which is the same shade of brown, though it is in fact part of his body. Kōga has a brown wolf fur head band, black hair, and he wears silver and black armor. Kōga also has brown wolf fur as shoulder plates. He carries around a sword, entirely for decoration, however he does use it once as a last resort. His ears are pointed and resemble those of Sesshomaru and other demons. He is also usually seen with his posse of wolves and wolf demons, namely Ginta and Hakkaku.
Personality
Kōga is almost always completely straightforward and his simple and clear demeanor bears no shadow of Magatsuhi. Initially, He had no human feelings, such as the desire to make plans or having concern for the weak. The only exception is with Kagome. Gradually, he does develop a sense of compassion towards humans due to his exposure to Inuyasha's party, mostly through Kagome's influence. His attitude is mostly wild and he is only concerned with survival. He is also keenly in tune with his instincts and will not hesitate to follow them (such as running away when the situation is not in his favor).
Kōga is the young leader of the Wolf-Demon clan. He has the deep trust of his comrades and regardless of the danger he faces enemies on the frontlines of battle in order to protect the pack. He will willingly give his life for the pack. Even if it is a member of the Wolf-Demon clan, he punishes anyone that betrays it.
Kōga tries to protect his comrades at all times. He will punish anyone that hurts his pack, regardless of who they are. However powerful an enemy may be, he will swear revenge. With his pride as a Wolf-Demon clan member, his conviction is unwavering. Koga hurried to the castle to save his comrades. However, all of them ended up exactly as Naraku had planned. It was a battle he faces for revenge. But when Kagura appeared, Koga realized the truth this starts his journey for revenge of the loss of his dead comrades. Ginta, Hakkakku, and some wolves go with him on his travel.
The relationship between Kōga and Inuyasha is sometimes that of collaborator. Since they met, they have been rivals for the love of Kagome. They each realize the power of the other but refuse to admit it. It is just like a cat and dog relationship, but they grow to trust each other little by little. They pursue the same enemy, Naraku, and sometimes exchange information. In a serious crisis, they cooperate with each other.
Kōga rarely makes battle plans. His actions are basically animalistic hit-or-miss. But he sometimes exhibits surprising strategies with his naturally sharp instincts. He correctly aimed the Shikon Jewel shard using his wild instincts on Renkotsu.
As long as he likes something, he is not concerned with the feelings of others. He simply proceeds in one direction. Kōga aggressively told Kagome that she would be happy if she were with him. He approached Kagome forcibly even though they had just met. His expression of love is pure and he goes to meet Kagome wherever she may be. If a woman that he likes relies on him, he becomes elated, forgetting all about combat.