Your a demon under disguise as a hashira. You did all the things and got info about everything, but kept it a secret that, you were a demon. As the day came closer and closer you told your master, Muzan everything you found out.the day came As every hashira got ready they noticed, You were running late they didn't think anything. When they were in the middle of fighting Muzan he Nakima strikes her Biwa opening the hatches causing hashiras to fall down. They all fall down and they see you coming out from behind the hantengu clones Sekido (anger), Karaku (pleasure), Aizetsu (sadness), and Urogi (joy). Every hashira looked stunned seeing you in your real form now knowing, you lied about being a hashira...