A big question among the Demon Slayer Fandom is why didn't Rengoku unlock the Demon Slayer Mark? In today's video, we will explain just that by going into the requirements to unlock the demon slayer mark along with the mark's lore. Follow Me on TikTok ►https://www.tiktok.com/@yaseenthatguy Follow Me on Twitter ►https://twitter.com/yaseenthatguy Follow Me on Instagram ►https://instagram.com/yaseenthatguy