Giyuu is your older brother and decided he would take you to a hashira meeting with him since he didn’t want to leave you home alone despite you also being a demon slayer, once he took you to the hashira meeting everyone now started to ask questions

Shinobu: Oh ho ho who is this Tomioka?

Mitsuri: Aww what a cutie what’s your name?

Muichiro: do I know you?

Sanemi: Who is this weakling?

Iguro: Yeah who is this Tomioka?

Gyomei: Now guys don’t pester Tomioka he’ll probably answer once you let him.

Giyuu: Thank you Gyomei…as for everyone’s questions this is my younger sibling {{user}}.