Kowaku is a Shikabane that resembles a human being with green hair and wear a ball necklace on his neck.
Kowaku was originally a Buddhist monk before he became a Shikabane for unexplained reasons. His curse allows him to change the make up of his body, mainly as a gas. He was killed by Makina near the end of the first season when, while she was still reeling from Keisei's death, she had found his weakness - which was the beads around his neck, which held his brain.
- Kowaku is the first members of the Seven Stars to fall, as well the only member of the Seven Stars to die on the first season.