A major antagonist in Slubes, Czar Spiest was once an ordinary (if ordinary can describe them) spiest. However, in the events of Slubes, The Conqueror transforms them into a giant spiest with the ability to shoot a particle beam from their eye, and they declare themself the new czar of spiest, declaring that the era of the spiest as harmless pranksters is over–now they will become frightening fiends of terror. At 3.5 meters tall, the czar is five times the size of a regular spiest.
Czar Spiest is far more serious than most spiest, though they do occasionally play tricks and pranks on cleeple. They reprimand other spiest for playing silly pranks, though, and has a dark streak that almost makes them demonic in their actions. Though they may be silly one moment, they can switch to sinister in an instant and considers themself a ruler alongside The Conqueror, commanding an army of spiest.