Legion is a group of demons mentioned in Christian literature. In the account, Jesus was said to have healed a man from a region in Caesaria Maritima in the Near East who was possessed by many demons. Jesus casts the demons out of the man, granting their request, and allows them to dwell in a herd of pigs. The pigs then drowned themselves in the Sea of Galilee. Their name comes from a Roman word meaning a unit of troops between 3,000 and 6,000.
"Origin: Middle East. A conglomeration of evil spirits in one. In the New Testament, they possess a man and are exorcised by Jesus. The demons are then cast into a herd of pigs, which kill themselves."
—Shin Megami Tensei A-Mode DDS Dictionary
Shin Megami Tensei IMAGINE
"An evil spirit whose name is derived from the Roman military term. Legion appears in Chapter 5, the Gospel of St. Mark, possessing a human body and uttering the line: "My name am Legion, for we are many." As its name signifies, it is not a single entity, but a vast amalgamation of souls. These souls, driven by hatred and jealousy, have lost all sense of individuality. In classical Latin, Legion's name was "Legio," the term for a Roman military unit of 5,000 soldiers. From this, the name "Legion" came to mean "army.""
—Shin Megami Tensei IMAGINE compendium
Legion can be contracted in Ichigaya Camp's silver level instance. It appears at night in Ueno, during the weekend invasion periods in Shinagawa, and in Shinagawa's Catacombs of the Templar Knight bronze-level during the new moon phase. It acts as the regular boss of the bronze instance of Kagurazaka Zhu Que Caverns.
Shin Megami Tensei IV
Legion can be found in Kasumigaseki when Flynn and company are transported to Infernal Tokyo. It can teach Flynn the Purple Smoke, Spirit Drain and Wind Breath skills through its Demon Whisper.
Shin Megami Tensei IV Apocalypse
"The spirit who said, "For we are many," in scripture. A conglomeration of evil spirits that experienced similar pains. The evil spirits see other spirits suffering similar troubles as part of themselves. As they gather, the boundary between the self and others breaks down, and they truly become one entity. The name comes from the Roman military term for an army unit of 3,000 to 6,000 men."
—Shin Megami Tensei IV: Apocalypse compendium
Legion may be encountered in the Kinshicho south exit shopping district. It can be one of the first demons to allow Nanashi access to the Zan skill.
Devil Summoner: Raidou Kuzunoha vs. The Soulless Army
"An evil spirit, made of many demons, born when ghosts suffering the same sort of pain bond together. The demons possessed a man from Gerasa, and Jesus cured him by casting them into a herd of pigs."
—Devil Summoner: Raidou Kuzunoha vs. The Soulless Army devil chart
Legion is the result of a fusion accident. There are five variations of Legion; normal, magic, heal, physical and rare variants. The rare variant has the passive skill Regenerate and is the only demon in the entire game to have it.
Persona 3 FES
"The spirit who said, "For we are many," in ancient scriptures. The name comes from the Roman military term for an army unit of 3,000 to 6,000 men."
—Persona 3 FES compendium
Persona 5
"The spirit who said, "For we are many," in ancient scriptures. The name comes from the Roman military term for an army unit of 3,000 to 6,000 men."
—Persona 5 background
Legion is the fifth Persona of the Fool Arcana and can be found as a Shadow in the Adyeshach area of Mementos with the title, "Fused Ghost." It is one of three Personas to learn the Life Drain skill and the first to learn the Negative Pile Physical skill. Legion is also one of the sources for the Null Dizzy passive skill. When itemized using Electric Chair execution, Legion will produce the Legion's Jail accessory, which nullifies Fear status.
The Shadow of Fumio Akitsu, a man who has changed his name many times and even had cosmetic surgery, takes the form of Legion when the party faces him in Mementos. He can be found on the third path of Akzeriyyuth during the "Man of Many Faces and Debts" request. Shadow Akitsu can deal a large amount of damage to the party even if he is outleveled, due to his Life Leech skill, which rips away 150 HP from a target. This skill also ignores guarding, doing the same damage to a party member who is actively defending themself. Shadow Akitsu will spend a turn groaning prior to casting Mudoon on a party member, and will do this constantly once his HP gets low.
"The spirit who said, "For we are many," in scripture. A conglomeration of evil spirits that experienced similar pains. The evil spirits see other spirits suffering similar troubles as part of themselves. As they gather, the boundary between the self and others breaks down, and they truly become one entity. The name comes from the Roman military term for an army unit of 3,000 to 6,000 men."
—Devil Survivor 2 compendium
Shin Megami Tensei: Liberation Dx2
"The spirit who said, "For we are many" in scripture. A conglomerate of evil spirits that experienced similar pains. The evil spirit sees other spirits suffering as their own, melding themselves together to truly become one."