Shiro Fujimoto, Rin and Yukios adopted father, encountered Tatsuma Suguro while trying to take the demonic sword, Kurikara. Tatsumas letter reveals the circumstances of how the sword, which is the Myoda Sects main object of worship, came to Rin.
blue-exorcist-ep-6Blue Exorcist Season 2 Episode 6
Blue Exorcist Season 2 Episode 6
A Wolf in Sheep’s Clothing