ONA
Description
Asmodeus is the fifth-born of the seven demon brothers and serves as the Avatar of Lust. He is a main character in the narrative, involved in the intimacy system that allows for building relationships with him. Once an angel in the Celestial Realm, where he was known as the Jewel of the Heavens and adored by many, he participated in the Great Celestial War alongside his brothers. Following their defeat, he fell from grace and became a demon in the Devildom.

In terms of personality, Asmodeus is a natural flirt who exudes charm and takes immense pride in his appearance. He considers himself a gift meant to be shared with the entire world and is strictly devoted to a beauty ritual, always applying a face mask before bed. He sleeps in the nude and refuses to engage in activities that might mess up his looks, such as doing dishes or gardening, as he worries about rough skin or dirty hands. Despite his narcissistic exterior, a Demon Brain Scan app revealed that 80 percent of his brain is occupied by thoughts of himself, with the remaining 20 percent split evenly between beauty and other matters. However, there are hints of insecurity beneath this vanity. The angel Simeon has observed that Asmodeus is still trying to fulfill the role of the adored angel he once was, a suggestion that Asmodeus laughs off as jealousy. He loves hosting parties and clubs, holding regular Asmo Night get-togethers, and enjoys listening to healing music as well as glam rock. He prefers smooth red bean paste over chunky because it is creamier and richer.

Asmodeus's motivations are deeply tied to his desire for admiration and attention. He wants to be surrounded by fans who adore him, and he works hard to maintain a positive and beautiful demeanor, avoiding showing others a less-than-fabulous side. He is a hard worker when it comes to beauty and fashion, having been hired as a beauty consultant by Majolish and asked by various companies to design accessories, shoes, and clothing. He handpicks photographers and designers for collaboration posters and takes hundreds of photos to select the perfect one. While he typically gets along with his brothers, he can become annoyed with them, such as when Beelzebub ate a trendy sweet he wanted to post on Devilgram.

His role in the story begins with indifference toward the main character, though he is curious as to why his charm ability does not work on them. This changes when the main character summons him using a portion of Solomon's power, drawing out his demonic abilities more potently than Solomon ever could. Impressed by this unexpected skill, Asmodeus forms a pact with the main character even though they failed to complete his original demand of obtaining a photo of Lucifer sleeping. From that point on, he becomes affectionate and doting, admitting in time that he loves the main character as much as he loves himself. After graduating from RAD, he works for Diavolo as a Press Secretary and also participates in fashion shows.

In terms of key relationships, Asmodeus looks up to and admires Lucifer greatly. He is the only one of the seven brothers to have multiple pacts with humans, having forged a pact with Solomon, to whom he gifted a huge oil painting of himself when they first formed their agreement. He has a close relationship with Satan, often relying on him, and he gets along well with Mammon, as both share interests in fashion and partying. He also has a habit of painting all of his brothers nails, including his own.

His development throughout the story revolves around his narcissism and growing affection for the main character. He evolves from a self-absorbed individual who sees humans as unworthy of his attention to someone who has found a person he thinks of more highly than himself. This character growth is rewarding to witness, as his personality changes due to his interactions with the main character, balancing comedic moments with heartfelt sincerity. Asmodeus is shown to be someone who, despite his flamboyant and self-centered nature, is capable of genuine care and attachment.

Asmodeus possesses the notable ability to charm people simply by having them look into his eyes, a power that is much more potent than that of the average demon. This is why he is surprised when his ability does not seem to have an effect on the main character. His power can be enhanced by others, such as when Solomon amplified his abilities to charm a giant snake, allowing the group to escape a labyrinth unharmed. When the main character used Solomon's incantation on him, he felt an overwhelming surge of power throughout his entire being. In the anime, he is portrayed indulging in self-centered fantasies, such as playing the role of a captured princess, which further highlights his dramatic and attention-seeking nature while also showing the willingness of his brothers to indulge his antics. He is the shortest of the brothers but often wears high heels to appear taller, has champagne-colored hair with long sweeping bangs, light orange eyes with a yellow gradient, and paints his nails in alternating patterns of pink and lime green or teal.