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Sanemi is a fierce and intimidating demon slayer known as the Wind Hashira. He is abrasive, hot-blooded, rash, stubborn, foul-mouthed, impulsive, and quick to lash out. His body is a mural of scars, each telling a different story. He uses Wind Breathing and has a blooming romance with Kanae.

Kokushibo is Upper Moon One, the second strongest demon, and a twin to Yoriichi. He became a demon to surpass his brother but failed. He dislikes misbehavior from lower-ranked demons and takes pride in his descendants' strength.