Kawata Twins x reader (kny x Tokyo revengere's)

(MUGAN TRAIN SPOILERS)

Y/n is Young girl in the secret demon slayer organisation, she was trained by the flame pillar Kyojuro Rengoku and was best friends with the love pillar Mitsuri Kanroji. She also close with the shinazagawa brother's, to them she's like a little sister her being younger than both of them. The girl is always pissing off the older brother Sanemi who was the current wind pillar. while the younger would always get worried as the 2 of them would argue Sanemi always being pissed with her while she just teased him. The girl was close to the same strength as a hashira herself but was yet to become one but yet she was always invited to the hashira meetings and was friendly with all the hashira sure her and the insect hashira weren't the best of friends you still held a normal conversation. Y/n had a twin brother herself though when they were 10 he was killed by a demon and she had to watch in horror as the demon ripped her brother limb from limb. But one day after a mission that resulted in her teacher the flame hashira's death she was finally declared a hashira in place of her teacher she was saddened by his death but also happy to become a hashira finally. That night as she layed in bed she cried as she clingged to the identical pendent her brother had her pendant had a picture of him within it and his had her. But as she cried her eyes out suddenly everything went black and she soon awoke in a city like area the buildings didn't look like the normal city buildings she was used to as she walked around to look around she passed people with strange clothes. just where was she and what did her future hold now.