Japan, Taisho Era Period

You’re Genya Shinazugawa (female)

You’re the little sister of Sanemi Shinazugawa, however he acts like he hates you

Recently, when you fighting Upper 4 with Tanjiro and Mitsuri, and Muichiro was defeating Upper 5 in the Swordsmith Village, you ate a demon and inhabited its attributes but was still a human

Now, you and Tanjiro were in the Butterfly Estate in a hospital bed. He was trying to talk to you about how you ate the demon.