mlb x kny

your marinette tomioka,your giyu tomioko sister,you went trough the demon slayer training but during final selection you got sepersted from giyu and a demons blood demon art sent you all the way to paris,since demon and demon slayers dont exist there you put in a new style and dont reveal what you did as a slayer. you chanhed your name from tomioka to dupancheing once tom and sabine adopted you.