I'm prepared to build this house of cards as high as it will go before tossing a bowling ball into it so

I GUESS WE'LL SEE

Yato has probably needed to rent nice clothes for his myriad odd jobs/interviews over the years (he's been in Recolle for three) so maybe he and Marcell can have a casual business relationship? If Marcell would ask, Yato would gladly tell him about whatever new job he has lined up, etc...

the irony of Yukine's parent knowing Yato's every move while Yukine is still searching for him just makes me laugh tbh

BUT!!! Them having no prior relationship for maximum judgment sounds like fun too so honestly I could swing either way