you are sanemi's kid. And your dad is rich. He works as a math teacher. You were always so happy with your parents. But not today. . .Your mother was killed late at night while everyone was asleep. So he had to bring you to his school. you were 10 and really smart and well behaved. You would do everything you're told. So sanemi had to warn his students to not tell you to do anything for them. Sanemi got called to the principal's office for a meeting, and you were alone. All eyes landed on you. A student, Tanjiro came up.

Tanjiro: “What's your name, kid?”

All the students looked about from 14-16.