Satan

"All smiles are nothing but an act. The cynical fourth-born."

"'Usually very rational and frank, but once you anger him you better run for your life. He hates Lucifer and is going through a rebellious phase.'"

Satan is the Avatar of Wrath and is the 4th oldest and physically the youngest among the seven demon brothers. He is one of the main characters in Obey Me! One Master to Rule Them All that is involved in the intimacy system of the game; therefore, users can interact and raise their relationship with him.

Appearance
Satan has layered blond hair that's parted in the middle and green eyes with a yellow gradient. Like all of the demon brothers, he wears nail polish, his in the color green.

Personality
Although he is the Avatar of Wrath, Satan conducts himself in a composed manner. He's sensible, quick-witted, and usually the voice of reason between the brothers until he comes into conflict with Lucifer. Born from Lucifer’s wrath, this bond and influence were undesirable for Satan. This fueled his hate and rebellious attitude towards Lucifer so much that he is willing to go out of his way just to oppose the latter. When truly angered, Satan can appear harsh and unforgiving. He also has a tendency to overthink things.

Satan has a love for knowledge, evident from the overflowing book collection spanning across various topics, and an appreciation of the fine arts. This may be, in part, related to his belief that knowledge can bring respect. Moreover, he is rather fond of animals, advocating for their well-being and indulging them with toys (his favorite animal is cats).

He also loves dramas of all kinds, especially detective ones. As he is a fan of them, he's also shown great skill in analyzing the situation. His skills are comparable to that of a detective's and his deductions are usually never wrong.

Background
After the Great Celestial War, Satan was "born" after Lucifer tore off his own wings, a result of his anger towards his Father1. He retained all of Lucifer's memories and feelings, but was nothing but the embodiment of the emotion wrath. Shortly after his birth, the Demon King placed him as the fourth oldest based on his power, despite being physically the youngest. Despite the circumstances, the brothers had raised him and taught him things, and Lucifer had the most influence on him, albeit not in the most positive ways.

Main Story
He's first ignored when Lucifer first started introducing his brothers. When introduced, Lucifer implies that looks can be deceiving and that Satan may seem like a responsible demon however only at first glance. He continues that Satan may give a smile such as that but warned MC to be careful for it is all an act.

Before the fuss about Mammon having made a pact with MC, he along with the other demon brothers are playing cards with Solomon winning. After a round, Solomon asks Asmodeus and Satan on why they always put down Mammon and that shouldn’t they be a bit more respectful since he was their older brother.

With that being said, Satan ignores what Solomon has to say and relays the news that MC was able to make a pact with Mammon, which later goes to Asmodeus asking why making a pact is such a big deal, putting forth his own pact with Solomon as an example

[Missing details on Lesson 3, please add!]

[Please note that this section is incomplete and has little information for the time being]

Trivia

 * His symbolic animal is a unicorn, which symbolizes strength and fierceness.
 * In legends, those of a pure heart (preferably a maiden) are the only ones who can tame them. This likely represents MC for after meeting them, Satan is no longer consumed by anger for Lucifer.
 * Satan has never managed to beat Lord Diavolo at chess.
 * Satan was likely designed to be the complete opposite of Lucifer in a visual sense
 * He has blond hair and greenish eyes, while Lucifer has black hair and reddish eyes
 * His casual outfit is more colorful and casual, while Lucifer's outfit is more dark and formal
 * His pose is a mirrored version of Lucifer's
 * He's the only brother who wasn't originally an angel; this is because he was born after Lucifer fell into Devildom.
 * He's also the only brother to have never interacted with Lilith in the Celestial Realm. His memories of her are shared with Lucifer's, which is same for other angels such as Michael.
 * His name on Devilgram is "stn".
 * He, Belphegor, and MC have a chat group called “The Formerly Anti-Lucifer League” and frequently mess with Lucifer.
 * In the TSL fandom, the Lord of Masks is based on him.
 * In the series he had a good impression of the Lord of Shadows until something happens in the unreleased volume.
 * His dance battle stage has a wolf. Wolves were often symbolized as devils in Christianity as they would hunt the sheep, which symbolized Christians. The phrase "wolf in sheep's clothing" perfectly describes him.
 * One of his favorite shows is "The Mid-Fall Murders", which is a television show from the Guard Me, Sherlock game.
 * This is probably a reference to the real-life television series, Midsomer Murders.
 * In a chat, he states that he wears pajamas to bed.
 * Satan's horns looks somewhat like an upside down version of Lucifer's.
 * He's also the only brother where his markings aren't shown in his demonic form, but this is because it's located on his back.
 * Satan is likely based on Sin from Paradise Lost. Sin was the daughter of Satan (Lucifer) and was "born" from his rebellion.

From Lessons
(may contain spoilers)
 * In Lessons 9 to 11, Satan eventually softens up to Lucifer after a series of events and is entrusted to deliver a speech on Lucifer's behalf.
 * In Lesson 39-4, after Lucifer recovered from his memory loss, Satan had clearly been concerned for his well-being, but denied it when Asmodeus brought it up.
 * When teaching Seductive Speechcraft to MC in Lesson 29-7, Satan was easily seduced by them when they meowed cutely.
 * This happens again in Lesson 46-7 if MC chooses to put on cat ears to battle Satan in an RPG game. He was easily seduced and took damage from it.
 * In Lesson 51-9, Simeon gave him the false name Sully, after which his brothers called him Sully Dear.

From Devilgram Stories

 * Though he claims to be an introvert, he actually is very good at meeting new people and building connections with them, as seen in his Devilgram Why Do People Love Cats.
 * In Mysterious Phenomena it is revealed that he once rescued a kitten while on a trip to the Human World.
 * He seems to look down upon manga, but in The Search for Self it's revealed that he has a high opinion about the manga titled "A Fallen Angel in His Prime" and when Levi replaces his book with manga as a prank in Trick Quest, Satan reads it all and admits he might have been too critical about manga.