I would think it would be a lot wider in the butt than is depicted here so it wouldn't ride up (more like a typical swimsuit or girls underpants). Or perhaps double sided tape (although you would think that would be uncomfortable in its own way to do that all the time). Or perhaps magic (although a constant expense of energy to keep it from riding up uncomfortably would be annoying as well).





Alternately, she could go the other direction and its a thong and you just have a thin strip that pretty much leaves your ass hanging out, although her cloak would cover that up most of the time.

