S-Kill is the main villain and final boss from Divekick. The boss of a mysterious evil organization, S-Kill is obsessed with "rebalancing" the world, so he can repackage it and sell with another name. After his subordinates fail to rebalance the divekicking, he decides to join the Divekick Tournament and rebalance it himself.

When confronted, S-Kill will comment on how each character is broken and how he plans to nerf them (with the exception of Jefailey, who due to being a joke character is perfectly balanced on S-Kill's opinion). S-Kill mainly fights by constantly teleporting, allowing him to easily divekick above the opponent's head. He also have infinite kickfactor, giving him even more speed.