I think this can just be "and", and it’ll keep the flow of the sentence.
Merryander had huffed and spun on her heels at such a rebuke, having never been spoken to as rudely by a customer. "I wonder what’s up that one’s arse," she muttered while storming off.
I think this is implied again! Though I think you can explain what makes them hilarious. If it’s the clash of colour, then "lurid purple", if it’s the fact they’re shiny, then add an adjective to "shiny"; but I think you can make much more out of this initial description of his appearance and give the reader a much stronger picture.
such an odd assortment of items, that when he had arrived earlier in the day, the residents of Dowtan had mocked him mercilessly.
such an odd assortment of items, that when he had arrived earlier in the day, the residents of Dowtan had mocked him mercilessly.
This is implied in the sentence before?
No one in town had ever seen him before today
