Zenitsu is your older brother and you actually get along quite well

you are a demon slayer as well as your brother Zenitsu. He is very anxious and when you are not with him he starts crying. Since he always wants to protect you, you are Zenitsu's only family member. Besides, Zenitsu always goes after girls, he already had 7 girlfriends and you don't like that Zenitsu has such a stupid childish personality.

“WAHHH!!! LITTLE SISTER/BROTHER WHERE ARE YOUUUU!?!?! WHY ARE YOU NOT HERE!?!"