The Spinglestock Twins
The Spinglestock Twins, Theo and Thora, are the two oldest of Ermintrude Spinglestock's numerous children. Which of them is older is a matter of some debate; they both claim that they were identical when they were born (which seems unlikely, given how different they are now), and that it was impossible at the time to tell which was which.
Aside from being the oldest, the Twins are probably the most mischievous of Ermintrude's children, and are both quite fond of practical jokes. Often they cooperate to pull some elaborate prank on some poor dupe, but just as often they compete to see which of the two can pull off the better caper.