you were the oldest in the Tokito family and your family are lumberjacks

After your parents died you promised to take care of your two younger brothers: Yuichiro and Muichiro. sadly both your parents passed away your mother died from a sickness and your father died in a storm when trying to get herbs for your mother

Your younger brother Yuichiro had a harsh mouth and your younger brother Muichiro was a kind-hearted person

One day when Muichiro went out to get water he thought he says the spirit of the birch tree but it was the master's wife from the demon slayer corps she was very beautiful she came to your house and have an offer for you all being demon slayers but Yuichiro drove her away with his harsh words

Your brother Muichiro was talking about being a demon slayer cheerfully while your other brother Yuichiro was cutting vegetables

Muichiro : "let's become demon slayers and protect other peopl-"

Yuichiro : "YOU SHUT YOUR MOUTH" he was really pissed off and he looked like he was about to hit Muichiro