After all the time she spent working with Vimes, Tyzias had gotten used to his medieval idiosyncrasies. His mumbling about "quantums" whenever things got really strange, his strange superstitions, and even his stubborn adherence to the belief that his world really was a giant disc carried by four giant-er elephants on the back of a giant-est turtle.

Now look at Tyzias. She's Booboo the Rustblooded Fool.

Her jaw drops, and the wooden skewer that appeared in her mouth the moment they exited the Dream Width nearly tumbles to the floor. She catches it on instinct and begins nervously chewing on it again. She looks exactly the same as she appeared in Vimes's memory: dirty, but well-maintained Watch uniform, dark brown human skin, and an absence of any troll biology. "Guess I owe you a drink, sir," she mutters, even speaking in an Ankh-Morpork accent.