Youmu's line falls out of context. I can't think of something more coherent.
Took some liberties, and given the context it seems fitting. The next few pages might prove me wrong though, in which case I'll pop back and change it.
Edit: Welp, the pool ended with no volume 6 at the moment. Still, in context, it seems to fit. Sakuya brought Reisen along, so Youmu mentions she has someone (or more than one) along with her. And Marisa apparently does too. I'd roll with it, but if anyone has a better idea what should go there feel free to change it.
Updated
I have a person accompanying me too...We'll have you handle this then...Understood..!What a coincidence.Me too.Well...Udonge...Come to think of it......it's not like we have too many yet.I see...