Serguei is Olaf's robot slave, and a minor character on the show.
As a robot, Serguei has several utilities and functions:
- Mode of transport
He is also very strong, and he can easily beat up the characters when given commands by Olaf. However, he can be controlled if somebody has a remote control, as seen when Stumpy and Mr. Cat took control of his body to make Olaf's team lose a baseball game.
Serguei resembles a refrigerator with robotic arms and legs. He has two lights resembling eyes on his "face", and an orange triangle resembling a beak, giving him a penguin-like appearance.