Making his anime debut in Demon Slayer's "Entertainment District Arc," Tengen Uzui stands out from other characters with his unique,cosplay-worthy design and cool Nichirin Cleavers. Furthermore, to Tanjiro, Inosuke and Zenitsu's surprise, the Sound Hashira has three incredibly beautiful wives. At the end of Season 2, Episode 12, there's a short scene that explains why Tengen has three wives, a trio of kunoichi named Makio, Suma and Hinatsuru.
Source：https://www.cbr.com/demon-slayer-tengen-uzui-three-wives-explained/
