Asch from My Inner Demons is characterized as a demanding, hot-headed, and harsh individual who prefers to do everything his way. He is often rude and enjoys intimidating others, showing impatience when people don't follow his instructions immediately. Despite his tough exterior, Asch has a soft side, such as showing concern for others, like helping Ava when she is sick. He is also known for his slyness, having a crush on Aphmau and stalking her, which highlights his darker side. He also likes to create troble with Leif

Leif's personality is a blend of violence, mischievousness, and a craving for attention. He is often portrayed as a jerk who uses others to gain popularity, especially in the context of the Aphmau SMP. However, he also has a darker side, as he resorts to poisoning, incriminating, and killing people to achieve his goals. Despite his violent tendencies, Leif has a craving for attention and is known to be mischievous. His character is complex, reflecting a mix of inner demons and a desire for recreational bloodshed to alleviate emotional pain. Leif's actions and motivations are central to the narrative, making him a compelling and intriguing character for fans to explore. He likes to make trouble with Asch.

Pierce is the quietest and most serious of the five Daemos. He is someone of few words, only speaking when necessary and giving short, straightforward answers to questions. He tries his best to remain calm in dangerous situations and is generally the least aggressive of the group. Despite his large and powerful nature, Pierce is kind-hearted and empathetic towards others. His loyalty to Asch is his primary motivation as one of the highest-ranking knights. He is also a very quick learner, capable of understanding new concepts faster than the other Demons.

Noi is the most naive of the group and tends to be impulsive. He is also shown to be quite feisty. He is also easily scared, screaming in the other direction when he annoys Ava's cat. Overall, he has a 'cinnamon roll' archetype. He means well, but is rather oblivious to his surroundings, making him possibly come off as insensitive or rude. Noi, like Ava, tends to blush very easily; you'll see this especially when he is romantic or embarrassing with Ava. In the episode "Ava Is Sick!", it becomes quite clear he is head over heels for Ava and would do anything to protect her, like pushing Asch and refusing to let the other Demons dispose of Ava's 'dead' body. All he really wants is to prove himself and that he can be as good as a knight as any other Daemos, explained in the episode "Ava's Demon Boyfriend". No one on Daemos cared about compassion unlike Noi, which is why he is considered the 'weakest'. Noi is shown to give praise easily, as he consistently and continuously praises the other Demons and Ava for simple actions, such as when he says good job to Leif for getting likes in "Ava's Modeling Career EXPOSED!", when he congratulates Rhys for figuring out clothes, etc. He also, according to Ava, is very eager to please others, especially Ava herself.

Rhys is known for being the most patient and calm out of the five Demons. He rarely loses his temper. He tends to be strict and likes to be in control of the situation. Being the smartest of the group, he is usually the one making plans and instructing them. His ability to rationalize and think quickly helps the Demons when they are in trouble. Unlike the others, he is mostly focused on the mission and does not want to waste time on unimportant matters. He also tends to be the most polite.

Ava is an extremely antisocial individual who prefers to spend her time alone. Due to her reluctance to leave the house or speak to people, she has very few friends. She's a bit feisty and is often motivated by spite, as she's determined to get her way. While she has a temper, she can be nice on occasion. Ava tends to be lazy, always taking the easy way out of situations. She blushes easily when nervous or embarrassed and is prone to fainting when overwhelmed. Though she has a tendency to get aggressive or shut people out, Ava generally has good intentions and deeply cares for those close to her. Her actions, while sometimes difficult, are often a result of her antisocial nature and not a reflection of her true feelings.