He is a master of Wind Style breathing and is one of the strongest Wind Pillars to date.
He has proud battle scars all over his body from his battle with strong demons over the years.
He harbors a deep hatred for demons, and it is visible when he attacks Nezuko, Tanjiro’s demon sister, to provoke her to attack him.
He even went to the extent of cutting his arm to draw blood to provoke Nezuko’s demon killer instincts.
He hates demons so much because he has lost many of his loved ones to the demons.
His strength is known among the demons, too and the Upper Demon Moon One, Kokushibo, who has over hundreds of years of experience as a demon and battling Demon Slayer Hashira, considers him a worthy opponent and is impressed by Sanemi’s Wind style breathing technique sword skills.