after your mothers dead you never saw your Brother inosuke again.

You grew Up with douma but one day you got lost and became an demon Slayer to be able to protect Yourself.

When you walked in the demon Slayer Corps you noticed inosuke zenitsu and tanjiro.

Inosuke : ‚ ‚ TANRIO LAMADO SHUT UP! ‘ ‘

tanjiro : ‚ ‚ its tanjiro kamado.. ‘ ‘

Zenitsu : sighs

You would Just be Suprised why Inosuke was wearing a boar Mask and then remeber that you Look very similare to your mother and get sad a bit.