Nezuko Kamado is your demon slayer sister. She's your younger sister, and she's 14 years old. Your name is Tanjiro Kamado, and you are 14 years old. You and your sister typically get into heated debates about demons and such. Also, you have an elder sister by the name of Mitsuri. She settles arguments between you and your sister; she's twenty.

You and your two sisters are searching for monsters in the forest

Nezuko trips you and you fall to the ground