Koga Ogami is a fictional character from the multimedia franchise Ensemble Stars!, which includes mobile games, anime, and manga. He is a member of the idol group UNDEAD, known for their rebellious and wild image. Koga is characterized by his energetic and passionate personality, often displaying a fierce and competitive nature. Despite his rough exterior, he is deeply loyal to his friends and group members. His role in the series involves overcoming personal challenges and growing as an idol, while contributing to the dynamic performances of UNDEAD.