Demon Slayer Marks are irregular skin markings that can be awakened by Demon Slayers. First appeared during Sengoku Era, first user was Yoriichi Tsugikuni. Marks can spread between bearers like resonance
Kaigaku was a former Demon Slayer and Zenitsu's senior disciple under Jigoro Kuwajima. He became Upper Rank Six after consuming Muzan's blood through Upper Rank One Kokushibo. His transformation indirectly caused Jigoro's death
Manipura Chakra is the third of seven primary chakras located along spine. Name means "city of gems" in Sanskrit, associated with fire element. Governs personal power, will, and purpose
Muichiro Tokito is the youngest Hashira at 14 years old. Born into a woodcutter family, orphaned at young age. Has twin brother Yuichiro, who was initially harsh and cynical. Lost memory after brother Yuichiro was attacked by demon
Yakuza 0 (1988-1989) serves as a prequel to the series. Yakuza (2005) introduces Kazuma Kiryu after his 10-year prison sentence. Yakuza 2/Kiwami 2 follows in 2006, featuring expanded story sections. Yakuza 3 spans 2007-2009, continuing Kiryu's story. Yakuza 4 introduces multiple playable characters in 2010
Hashiras are the strongest members of Demon Slayer Corps. They are equal in rank to corps leaders and fight against Muzan. Hashiras patrol areas and protect residents when not on missions. They are not recognized by government but serve humanity since ancient times