Boris Habit

Initially, through the website advertisement and in the first PSA video the Flower Kid sees, Dr. Habit presents himself as a happy and caring individual. However, he is stilted enough to come off as uncanny through his eccentric speech patterns; which involve an abundance of typos, improper grammar, and smiley face emoticons.

Though initially friendly, when Flower Kid cheers up the Habiticians Dr. Habit slowly becomes more unsettling and passive-aggressive, believing that making people happy should be his job only. He quickly begins acting jealous and cold, singling out Flower Kid with threatening messages as punishment for giving the Habiticians "false hope." He repeatedly mentions the "Big Event" as something the Habiticians should "save their smiles" for, and even encourages residents to dwell on or exacerbate their depressive thoughts to combat the spreading happiness. Habit has had this mean streak before the Flower Kid arrived, mocking Kamal and Randy's problems. It is implied he did the same to Wallus.

Alongside his vindictiveness, however, he is also very sensitive about his work and shows signs of depression. Tiff was unable to break her contract with Habit due to him breaking down sobbing whenever she tried to quit or rejected one of his songs. Whether this was genuine or an act of manipulation is up for interpretation. His Carnival Attendants, who seem to be made from crumpled paper or metal, all refer to him as "dad" or "father" to different degrees, and when inspecting objects related to Habit such as the crumpled pages or the Tooth Lily, the Fortune Teller implies and then outright states that he "hasn't been happy in a long time."

Habit is obsessed with teeth, and reveals the true purpose of The Habitat was to use Martha to create a gas- likely nitrous oxide, also known as laughing gas- and then steal the teeth of the Habiticians while they are under its effects. It is unclear if this is so he can implant them in himself to become a "bioweapon" of happiness and smiles or to implant them in others to make more people smile. His interest in teeth seems to have stemmed from his parents' unhappiness growing up. His father is implied to have hit him, knocking his teeth out and leading to Habit being teased by Martha at school for not having teeth to smile with. He resented the fact that his parents had perfect teeth but never smiled and were constantly unhappy. It seems he has also always been rather disconcerting when working, as his diary pages also mention all his patients running away from him screaming. Habit also takes insults to teeth and poor dental hygiene personally, and feels that only good, happy people deserve perfect teeth.

Despite his frightening methods, Kamal describes Habit as having a soft spot in him still, which reveals itself when confronting him with the Tooth Lily. His demeanor instantly shifts to eloquent and somber in stark contrast to his manic and disturbing mannerisms while extracting the Flower Kid's teeth, and he seems ashamed of his actions after seeing the Flower Kid cheering the Habiticians up by being personal and considerate. He is also very lonely and seems to have some self-loathing, acting very surprised and glad if the Flower Kid agrees to be his friend. In the bad ending, it is noted that Habit does not make a move against Flower Kid, and seems to believe he deserves to die, stating that a "younger him would've done the same." After Flower Kid makes the finishing blow, he calls them "Flower Hero," implying that Dr. Habit sees himself as the villain.

Though the places he applies them are particular and strange, even scary, Habit has always been patient and dedicated to what he loves. As a child he took the time and cared enough to make his lily grow, even remarking as an adult that the gardening process is very specific and secret. The posters scattered around The Habitat are likely all his own designs, and The Habitat itself serves as an example of how far he is willing to go for something he cares about. Other creations of his include Martha, the carnival games and attendants, presumably his puppet of himself, and the songs he wrote for Tiff to sing.