However, among all the demons in Demon Slayer, there was one who may have been favored by the demon lord: Rui. Rui was one of the antagonists of Demon Slayer's first season. While he wasn’t the ...

The Hashira of Demon Slayer ... of the lower six demon Rui, who he easily defeats using his technique, "dead calm." The main Hashira in the Mugen Train arc of the Demon Slayer series, the Flame ...