"have to bow down to a mouse." would just mean "have to ask Naz (or her friends) a favor to find it out." wouldn't it?
Um, excuse me. You dropped your wallet..... Well, now...Oh!.... Are you on your own today?See?PoffWhat do you suppose would be good, Unzan?Oh, no.Honestly, I just happened to...pick...it...Oh!UmmToday, I've gone shopping on the surface.TurnYou're that cloud-loving person we met once.Y-yesh...Thanks for your business!No, Unzan's right here with me. He just stays small and hides because he's shy.H-hello...P—...please don't tease me...WfffHm hm hm-hmmm♪What?A wallet?SNACKSPlopEh? Oh, why, thank you!SStarrrreThere's no need, really...I'm being seriously stared at...!10%?Wah!Heh heh heh, will you snuggle him?In any case, I have to thank you somehow. If I'd gone home with the item still lost, I'd have had to ask the mouse for a favor.