An Incubus is a demon in male form supposed to lie upon sleepers, especially women, in order to have sexual intercourse with them, according to a number of mythological and legendary traditions. Its female counterpart is the Succubus. An incubus may pursue sexual relations with a woman in order to father a child, as in the legend of Merlin.
Religious tradition holds that repeated intercourse with an incubus or succubus may result in the deterioration of health, or even death. In medieval times, the church would use incubi and succubi to explain sexual functions, which were taboo subjects.
Incubus appear in Ichigaya and Ikebukuro at night. They appear as support for the Succubus field boss in Shinjuku Babel's docks area and as field bosses within Suginami's Diaspora instance. Incubus appears as the final boss in the Deranged Scheme questline, as an apex in his attempts to seduce a Pixie.
"Originating in European folklore, the incubus is the male counterpart to the succubus. It ravishes women while they sleep, impregnating them and causing nightmares. Offspring born from such encounters are said to be evil spirits and witches. If one is possessed by an incubus, churches could perform purifications which could ward the incubus off."
—Devil Summoner: Soul Hackers Compendium
Devil Summoner: Raidou Kuzunoha vs the Soulless ArmyEdit
"A demon originating in European folklore, the incubus is the male counterpart to the succubus. It ravishes women while they sleep, impregnating them and causing nightmares."