In 1974, Colin was cleaning the bathroom at the school when 9-year-old Alessa Gillespie ran into the room to hide from bullying classmates. Aware that Alessa was hated by the townspeople, Colin used the opportunity to rape her, leaving her crying and frightened. Not long after, Alessa was burned alive by the town’s cult, causing her to manifest psionic powers. She used her powers to torture and kill Colin, leaving him strung up with barbed wire in the same stall in which he assaulted her.
After Alessa split her soul and created the Otherworld, the Janitor appeared in her world as an undead monster in the female restroom. Barbed wire is wrapped around his ankles, tying them behind his head and digging into his eyes, forcing him to crawl on his genitals. He flicks a blackened, dirty tongue and screams in pain as he drags himself along the floor, his agony doubtless a result of Alessa’s desire to punish him. Everything he touches turns to decay, symbolic of a sexually transmitted disease. His decay summons the Creepers.
The Janitor is a symbol of Alessa’s hatred for him after he sexually assaulted her. The janitor monster’s appearance is specifically made to resemble someone whose body has been eroded by a venereal disease, and he has a blackened tongue that he flicks in a sexual manner. The barbed wire that ties his feet to his head forces him to crawl against his genitals at all times, and makes any sort of sexual action impossible. It is also possible that the barbed wire passing through his eyes is meant to symbolize his never being able to look lustfully at a child again, as well as his eyes being damned for ever doing so in the first place.