Loki

Loki (ロキ, Roki) is a recurring demon in the series. He is the primary antagonist of the original Digital Devil Story: Megami Tensei novel, as well as the cult-classic anime adaptation it spawned. Similar to the Norse Mythology, Loki is portrayed as being rebellious and tricky; but at the same time, possesses a cruel and ruthless personality. In Shin Megami Tensei series, Loki appears as a high level demon; capable to recruit once players reached a sufficient high level. Furthermore, in the Persona franchise, Loki appears as a high level Persona, and is more often associated with the Fool Arcana.

History
Norse. Depending on whom you ask, an aesir, a jotun, or both. A trickster god, he starts out as at least on the side of the aesir, but crosses the line when he engineers Baldr's death. He will lead the armies of the jotun during Ragnarok.

Appearances

 * Digital Devil Story: Megami Tensei: Antagonist
 * Megami Tensei: Antagonist
 * Shin Megami Tensei: Majin Clan
 * Shin Megami Tensei II: Maou Clan
 * Shin Megami Tensei: Strange Journey: Tyrant Race
 * Shin Megami Tensei: Devil Summoner: Maou Clan
 * Devil Summoner: Soul Hackers: Maou Clan
 * Megami Ibunroku Persona: Devil Arcana
 * Persona 2: Innocent Sin: Tower Arcana
 * Persona 2: Eternal Punishment: Tower Arcana
 * Persona 3: Fool Arcana
 * Persona 3: FES: Fool Arcana
 * Persona 3 Portable: Fool Arcana
 * Persona 4: Fool Arcana
 * Persona 4 The Animation
 * Shin Megami Tensei: DemiKids: Light Version
 * Shin Megami Tensei: DemiKids: Dark Version
 * Shin Megami Tensei: Devil Children Fire Book
 * Shin Megami Tensei: Devil Children Ice Book
 * Devil Survivor: Tyrant Race
 * Devil Survivor 2: Tyrant Race

Digital Devil Story: Megami Tensei
Loki serves as the main antagonist of Digital Devil Story: Megami Tensei. Akemi Nakajima summons Loki and has him get revenge on several students at Jusho High School. Loki seizes control of several students bodies and murders the students that Nakajima wanted revenge on. Loki then demanded women be sacrificed to him, eventually allowing him to impregnate Ohara, one of Nakajima's teachers. While Nakajima was no longer watching, Loki practiced teleporting through computer screens and taking physical form, which he eventually uses to rape and kill Yumiko Shirasagi, one of Nakajima's fellow students who happens to be the reincarnation of Izanami. Nakajima attacks Loki with Cerberus and then escapes to Asuka, where he plans to resurrect Yumiko. Loki, angry at being injured and fearful of Nakajima summoning other demon lords that could compete with him, follows Nakajima to the tomb with the hopes of killing him. Loki kills Yomotsu-Shikome and he causes Yumiko's body to rot and attack Nakajima in an attempt to break his spirit. Izanami appears to fight Loki, but Loki captures her and prepares to rape her. Nakajima manages to summon Hi-no-Kagutsuchi as a sword and uses it to kill Loki.

Megami Tensei
Loki appears in Megami Tensei as a secondary antagonist. Lucifer resurrects Loki for him to aid him in the takeover of Earth.

Shin Megami Tensei
As an effect of his race, Loki is oddly categorized as "law" and "Light" aligned, an odd choice for the demon.

Shin Megami Tensei II
Loki's race as a Deity has been subverted in Shin Megami Tensei II and he is now a Level 49 Tyrant.

Shin Megami Tensei III: Nocturne
Loki appears as a recruitable demon in Shin Megami Tensei III: Nocturne. He can be recruited should the Hito-Shura's Lv. be higher than Loki's initial Lv. 52. He is also a barfly that frequents Nyx's lounge in Ginza.

He is approached in order to purchase a 1000-Yen Bill that the Collector Manikin in the Great Underpass of Ginza requests. However, taking advantage of human items' rarity in the Vortex World, he intends to charge the Hito-Shura 100,000,000 Macca for the bill.

Instead, taking advantage of Loki's room's back entrance, the Demi-Fiend will slay his guardian, Troll, and ransack Loki's room and the several chests of valuables he keeps there. This eventually has some consequences if the player decides to pursue the Labyrinth of Amala quest, as Loki, to compensate for the loss of his valuables, will sell the key he was supposed to guard for more drinking money.

Persona 3 / FES / Portable
Loki, when paired up with Susa-no-O, allows the protagonist to use the Fusion Spell Trickster, which inflicts multiple mental ailments upon all enemies, alluding their roles as tricksters among deities.

His combat traits remain unchanged throughout the subsequent iterations of Persona 3, however he gets a design update in Persona 3 Portable where he uses his Devil Summoner: Soul Hackers design instead.

Persona 4
Loki appears as the Ultimate Persona of the Fool Arcana in Persona 4, sporting his Soul Hackers design. He is available to be summoned once the Protagonist manages to gain access to the Normal Ending route, which maxes out the Fool Arcana Social Link. Furthermore, he can only be summoned once the Protagonist reaches Lv. 64 or above.

Loki also holds the distinction of being able to learn the most powerful Ice Elemental skill throughout whole game, Niflheim.

Persona 4 The Animation
In the True Ending special, Magaret summons Loki to attack Yu and help him regain his confidence in fighting against Izanami-No-Okami. Loki was defeated through the combined efforts of Makami of the Hanged Man Arcana, Abaddon of the Tower Arcana, Genbu of the Temperence Arcana, Mot of the Death Arcana, and Beelzebub of the Devil Arcana

Devil Survivor
Loki disguises himself as an unnamed human being, known only as Gigolo by the in-game dialogue boxes. He is voiced by in the English version of Overclocked.

Gigolo's knowledge of the history of the demon world has helped the protagonist from time to time, most notably hinting towards the location of the Devil's Fuge so that the protagonist can defeat Beldr. Loki has no interest in the Throne of Bel, and does everything for his own amusement.

In the Desparate Escape ending, Loki appears in his human form and tells off the protagonist for attempting to escape the lockdown instead of fighting for the Throne of Bel. If the player failed to save Haru (and thus not need to fight Belial), he also calls the player a failure for "dropping out". After revealing his true form, he attacks the protagonist's party, and even creates duplicates of himself to confuse them.

In the Kingdom of Saints ending, Loki also appears while the protagonist faces off against Naoya. Upon seeing the two siblings fight, he finds it fit to join in for his own amusement, and reveals his true form.

After defeating Loki in either battle, Loki becomes available for the player to fuse.

Devil Survivor 2
Loki has a small appearance as an enemy with dialogue. Polaris in his second phase summons him and in this incarnation, he talks like a rocker.