Oh, golly! I bet there could be a whole side-event in a story wherein Auru is with rosen getting their full initiation into Little Space while the other party members go about other business.

Auru, I believe, would have the urge to relieve themselves and would, quite bashfully, ask Rosen about this prior to pointing to a sign in which states the rules are to "Let yourself go" isn't just for dropping the responsibilities of 'adulting'.

There may be quite a number of 'checks' to see how Auru gets through this. Perhaps they have a bit of 'pee shyness' in which needs either special assistance from a caretaker, or they'd have to find a way to feel more comfortable letting go in non-common places.

I'd imagine that, once Auru was able to feel good in using their diapers, that they would gain more bonusses regarding day-to-day missions and activities.

***

The reason I mention bonuses is how it took me forever to wear a diaper under my pants, or shorts. It was so cozy walking around town feeling that padded softness and knowing nobody really cared. I once even, due to bad timing during my long walk, used it.

I find the more I wear diapers the more confident I feel in myself, the more the shame of it fades to nothingness, and how there's a sense of peace to go against the very rules that are often responsible for why I struggle to be next-to-nothing IRL due to how people who are blind having such bothersome stigmas, stereotypes, etc.

(My personal favorite is that I lost all my sight because my family and I were Satan worshippers. Yep, so me. Cute little dino-duck who likes wearing diapers and getting lots of love and cuddles is getting pentagrams on my padding.) *Sighs*