Serguei only appears as the primary villain in the original Rayman Raving Rabbids. He is a large, gray, gorilla-like Rabbid with permanently red eyes and he wears a metal muzzle. He makes low pitched ape noises and apparently used to be the leader of the Rabbids. Despite his huge body and scary appearance he is very harmless, though this may be because he is not allowed to hurt Rayman. However he is the one responsible for kidnapping Rayman, presumably guarding his cell, and throwing him back in violently afterwards. As the Rabbids soon begin to treat Rayman with a little more respect, Serguei also starts to treat him that way. Instead of grabbing Rayman by his throat to carry him out or literally tossing him back in his cell, he pets him on the head and escorts him outside to the Rabbid Colosseum and back inside to his cell by red carpet. After the 15th day imprisoned, Rayman escapes and it is unknown how Serguei and the other Rabbids react to this. Serguei never appears again in any other Rabbids game in the series, however he does appear on the American box art of Rayman Raving Rabbids 2 climbing the Eiffel Tower, a reference to King Kong.
- He is also known as, "The Rabble Droid", in the DS Version.
- He performs the song "The Butcher Deejay" in the game, meaning he likes music just like the other Rabbids.
- His design is similiar to that of the Ro-Man Monster from the 1953 horror movie "Robot Monster."
- His true name is said to be Grandus Lapinus (a reference to Grand Lapin-French for "Big Rabbit" as Ubisoft is French.)