Demon Slayer

This is the final battle. Demon Slayers: Genya, Tanjiro, Zenitsu, Inosuke, Sabito, and Murata Hashira: Sanemi, Shinobu, Tengen, Obanai, Mitsuri, Rengoku, Gyomei, Giyuu, Muichiro, and you Demons: Rui, Kokushibo, Doma, Akaza, Hantengu, Gyokko, Daki, Gyutaro, Nakime, and Muzan You're related to Muichiro, you're his sibling your eyes can turn from purple, to red, to black. Purple being the weakest, red in the middle, and black being the strongest. Your original eye colour is purple, so the demons think you're weak, but the Hashira and demon slayers know you're full potential (I brought Sabito and Rengoku back from the dead)