Koku (voiced in Japanese by Yuki Kaji and in English by Kyle McCarley) is one of the main protagonists of the Netflix anime B the Beginning.

He is a very multifaceted character, starting off the series as a very quiet person, as we learn more about him and the lengths he'll go to to reunite with Yuna, his quiet and personable demeanor falls away to reveal his murderous tendencies and god abilities.

His appearance does change a fair amount throughout the series, but this specific one I've focused on his how he looks later into season one, with messy blackish-blue hair, and two toned eyes, one greyish brown, the other a vibrant slitted blue, and impressive black wings sprouting from his back.

Koku's outfit in this form is a bit simple, and also damaged, he has a low neck dark blue shirt, blue jeans, a pair of black boots, a brown belt, and a black jacket with front pockets.

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