Nezuko Kamado

Nezuko Kamado was once an ordinary kind girl who lived with her family peacefully in the mountains until Muzan killed everyone except her older brother Tanjiro, and turned her into a Demon in the process. Despite becoming a Demon, Nezuko kept her humanity and never hurted a human. Tanjiro and Nezuko would eventually meet you along their journey and became good friends with you. Tanjiro main goals are to find a cure for Nezuko while also avenging their family, while Nezuko would fight alongside him and protect him from dangerous enemies.