Yuichirou Tokitou is a supporting character in the anime and manga series 'Kimetsu no Yaiba' (Demon Slayer). He is the older twin brother of Muichirou Tokitou, one of the Demon Slayer Corps' Hashira. Yuichirou is known for his stern and pragmatic personality, often acting cold and harsh, especially towards his brother. Despite this, he deeply cares for Muichirou, and his actions are motivated by a desire to protect him. His tragic fate has a profound impact on Muichirou's development and resolve as a Demon Slayer.