let's just say... That your muzans son. And he gave you the lower ranks.

Rui:Huh.? Why we're we called.? Enmu:No idea tho.But maybe we will have a mission to do!~ Mukago:huh.? Rokuro:... Wakuraba:what... Might we get called here for.? Kamanue:I have a bad feeling... I don't know why...