Satan (サタン, Satan) is a recurring important figure revolving the Shin Megami Tensei series. Throughout the series, Satan serves as a servant of YHVH, which he also shares a black and white belief. Satan is commonly associated with temptation of God, and is often portrayed as judgmental. In the Persona franchise, Satan appears as a high-level Persona. Satan, in every series' continuity, is also Lucifer's enemy, and each of them detests the other.
Satan is a prominent figure in the Abrahamic religions, playing various roles in their literature. It may either be depicted as a rebel to the will of God, or as one who tempts mankind to commit sin to show God that mankind can easily be led astray from Him. In Judaism, Satan is an agent of God, with no will of its own. Satan would appear to those who are sinful, playing into their hearts and towing them into despair. In Christian literature, when God commanded the angels to bow to Adam, a human, Satan (then called Lucifer or Helel) allied other angels against this command with the belief that angels are above all other creations. It and other "fallen angels" fought against the forces of God and was utterly defeated; as a result, Satan was cast down into hell. In Islam, Satan refer to demons, with Iblis as their figurehead who played the role of Satan in Christianity.
Satan, better known as Zayin is a member of the Temple Knights alongside Hiroko. He appears as a firm believer of the Center and a commanding officer for Aleph. However, he rebels after witnessing the tragedies that the Center inflicts upon the people of Tokyo Millennium and discovers the true nature of the Thousand Year Kingdom. Learning the flaws and lies of the center, Zayin dedicates himself of spreading the truth about the Center's machinations. It is also revealed that he is another of the Center's creations, designated to protect Aleph.
It is later revealed that Zayin is actually an incarnation of Satan, an instrument of YHVH's will sent to judge all creatures on Earth; both men and demons alike. He fuses with his other half (Seth) and transforms into his true form.
Depending upon the player's options, Satan plays either the role of an enemy or an ally. In the Neutral and Chaos alignment paths, he attempts to use the Megiddo Arc (a powerful laser weapon within Eden) to destroy all life on the planet as his judgment. He is killed by Aleph before he can carry out his plans, and his death prompts the appearance of YHVH. In the Law alignment path he joins forces with Aleph and Hiroko to defeat YHVH after it wipes out humanity on Earth. Afterwards, having killed his creator, he crumbles to dust.
Satan appears a high level Magatama in Shin Megami Tensei III: Nocturne. It can be acquired by defeating the optional boss Black Frost in the Kabukicho Prison. It focuses mainly on magic growth.
Satan makes an appearance as the Ultimate Boss in Digital Devil Saga: Avatar Tuner 2. He can be fought in the final dungeon, the Sun, where he attempts to deliver his judgment towards the party in the place of God. Unique from other bosses, Satan can only be fought under the Hard mode difficulty, or players transfer the Save Data of Digital Devil Saga: Avatar Tuner onto the sequel and select Hard Mode. His special attack is God's Breath, which can only be avoided if the player's party kept enacting the Charge combo spell. God's Breath can be survived with Close Call, although it's futile trying it.
Interestingly, Satan's attacks and speech during battle reminiscence of his role and story in Shin Megami Tensei II, with him proclaiming God would force judgment upon Seraph and his assertion that a heretic was trying to destroy the balance of the universe. Besides, Schrödinger will state at the end of the battle he was only a memory and that the God he worshipped was different from the God awaiting at the final layer of the Sun.
Satan appears as the ultimate persona of the Judgement Arcana in Persona 2: Innocent Sin. He is the highest-leveled Judgement Arcana persona available throughout the game, capable only of being summoned once the player reaches Lv. 91 or above. Satan, along with Lucifer, grants the most powerful Fusion Spell, Armageddon, which instantly destroys all foes regardless of their affinities, including all bosses. Satan's appearance in Innocent Sin resembles his 'true' form in Shin Megami Tensei II, having a dragon-esque head resembling Seth.
Satan returns as the ultimate Persona of Judgement Arcana and one of the highest leveled personas in Persona 2: Eternal Punishment. His material card can be purchased in the Mu Continent for 50,000 coins after Ellen has left the party. Satan, along with Lucifer, is one of the ultimate personas of the game, only being available for summoning once the player has reached Lv. 91 or above. His unique Fusion Spell with Lucifer, Armageddon, is now ineffective against one Ultimate Boss. Casting this unto him will result in a counterattack, Armageddon R, which immediately wipes out all party members.
"The prince of darkness in Judeo-Christian lore, known for his role as the snake that tempted Adam and Eve at Eden. It is also said he is sent by God to test man`s piety."
—Persona 3 FES Compendium
Satan appears as a persona of the Judgement arcana. He is available to be summoned if the player has reached LV 78 or above. Satan and Helel's Fusion Raid, Armageddon, always deals 9999 Almighty damage to all enemies regardless of the target's defense, making it the most powerful spell in the game.
Satan appears as a persona of the Judgement Arcana in Persona 4. He is available to be summoned should players have reached Lv. 76 or above. Interestingly, Satan's in-game model's color palette bears a darker hue and a stronger contrast compared to Persona 3. His portrait is more faithful to the original illustration in Shin Megami Tensei II, prominently retains the 6 nipples which were edited out in Persona 3.
"His name means "opposer". The prince of darkness in Judeo-Christian lore, known for his role as the snake that tempted Adam and Eve at Eden. It is also said he is sent by God to test man's piety."
—Devil Survivor 2 Compendium info
Satan appears as the strongest of the Fallen race, and is also the demon with the highest base level that does not require unlocking. Some of the combinations to fuse him involve Lucifer.
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