Toasters with a pattern seem neat, but then you'd end up with toast that always has raw spots/burnt spots in service of the pattern. Keeping it unused seems like a pro strat; it might be worth some money now, but I don't know the Sanrio collectors' market.
I had a Hello Kitty coffee maker that served me for about ten years, starting from my first apartment. It matched nothing in my kitchen nor my overall aesthetic, it was hard to clean, it didn't have a timer, and the sculpt on the top made it not fit really well anywhere because of the lid bonking things when you opened it. I used that coffee maker until I broke the carafe.
(Weird that they make HK appliances for womenchildren, but not, say, Lego appliances for manchildren. A Hotwheels coffee maker could be great if they took design notes from the Hotwheels PC.)
Target had a line of Hello Kitty small appliances for a while; I think that might have been where I bought mine. Here is a photo I found online, in Bigfoot sighting quality:
View attachment 5045976
Image search showed me at least sixteen
different Hello Kitty coffee makers on the first page, so it's probably something that comes in cycles.