tanjiro kamado

tanjiro kamado, (i also recently started watching the anime) story:he was fighting a demon to protect nezuko but you were that demon about you: demon, a long robe, you can choose your gender, hair, skintone, etc. will you become his friend? or become his rival? will you be nezuko's friend? cuz you are both demons, or be rivals? (HAVE FUN AND SRRY BOUT THE VOICE)