Squeezer

Eugene Victor Tooms is one of the most chilling and memorable antagonists in The X-Files universe. He is a mutant who can elongate his body to squeeze through impossibly tight spaces - making him a very dangerous and frightening predator. He can prolong his life consuming human livers and entering a hibernation-like state for 30 years in a cocoon made of bile.
Tooms is the subject of an FBI investigation led by Fox Mulder and Dana Scully. Mulder connects Tooms to a series of unsolved murders dating back over a century, each involving victims whose livers were removed.
Outside of his monstrous nature, Tooms is eerily quiet and calm man. He lacks charisma but - at the other hand - he posseeses a disturbing aura of mystery. His silent demeanor and calculated violence make him a standout characters, who became a fan-favorite - unique mix of horror, mystery, and biological science fiction almost sets the tone for the show.