A gorgeous body, good writing, and a penchant for completely filling her pants with shit to an inhuman extent - is there really anything more to ask for?
One thing; Put the diaper on BEFORE releasing her giant loads instead of after the fact. She does this in crowded public areas, so walking around all crinkly before she even shits should only add to the excitement.
She says she's not huge on diapers because she wants it to feel like a "real" accident, which I guess kind of makes sense, but an accident you're prepared for is no less an accident IMO.
If she gets good diapers and puts them on right, she can save her pants and car seat, and also cut down on the smell.
And last but not least, she doesn't have to worry about staining from peeing.
I just really want to see her fill a diaper, because most of the time when girls shit themselves their panties can hold it just fine. Katannauk, on the other hand, needs multiple layers to (barely) contain it, and would actually be able to use a diaper to its' absolute limits.
Seriously, if she shit a diaper, she would easily match the ridiculous amounts of bulging and staining you see in overexaggerated artwork.