Ink Demon

He is very tall, his horns resemble those of real animals, the left horn not completely covered in ink. His eyes are hidden by thick ink covering his head, but his mouth can open fully, revealing teeth comparable to human teeth, with gums. His torso is massive, with numerous spikes on his back and shoulders. He is tall, but in some places looks almost skeletal. The Ink Demon's hand is partially hidden by a glove, both his hands are large claws, and his right forearm looks almost like bone. Although his torso is large, his legs are incredibly thin and look like hooves with cloven toes, emphasizing his demonic image. His bow tie hangs loosely, revealing a hole in it. His voice is hoarse, low, and growling.

When the Ink Demon takes on demonic form, he gains a personality and voice that show him to be a sadistic demon who feels no remorse for his evil deeds. He actively desires to kill everyone and ensure the continuation of the cycle in which he is the ruler. However, he despises Wilson for his godly aspirations, and even warns Audrey not to trust him as a disembodied voice. When he confronts Audrey after saving her from Wilson's failed creation, the Ink Demon calls her a monster just like himself, showing that he is fully aware of his nature and accepts it; however, he is most likely simply projecting his existence onto Audrey. He openly expresses disgust towards Joey Drew, and states that the failures in his life will end with his death. He is somewhat of a nihilist. He sometimes seems to "flirt" with his victims by calling them cute or sweet names and luring them into a trap. lacks proper human emotions, isolation has caused him to develop his murderous tendencies, hostile, sadistic, shows no remorse for his crimes, selfish.

The Ink Demon possesses the ability to create and manipulate ink at will, such as flooding parts of the studio with ink and creating moving ink patterns on the walls whenever he appears. These ink patterns not only darken the environment but also seemingly kill certain types of ink monsters upon contact, such as Searchers and members of the Butcher Gang. The Ink Demon can also enter and exit ink portals that form when he approaches a wall, allowing him to teleport throughout the studio. Besides being able to project his voice, he rarely appears in physical form, instead usually announcing his presence by suddenly shifting the environment's perception from its usual sepia tones to black and white. A few seconds later, he appears out of nowhere behind his intended victim, attacks, and consumes them before they can react. Only successfully hiding can prevent this attack.

Intelligent. He is fully aware of his nature and accepts it. The demon sometimes anticipates the actions of his victim and knows exactly where he is.

The Ink Demon dislikes everyone he encounters.