Peri is a being from Persian lore. Although descended from fallen angels, they are not always evil. The evil, discordant beings known as divs try to imprison the peris as punishment for their failure to rebel against the forces of good.
Peri can be found within the Monochrome Forest in the Expanse. She can teach Flynn the Diarahan, Me Patra, Panic Voice and Maragidyne skills through her Demon Whisper.
Shin Megami Tensei IV Apocalypse
"A fairy or spirit of Persian lore with white, dove-like wings. They are often drawn as beautiful maidens. They eat fragrant scents such as musk, and when their blood dries, it is said to form a gem. They are skilled magicians and can do feats such as transformation, flight, and prophesying. They often help heroes with their magic, sometimes even becoming their wives."
—Shin Megami Tensei IV Apocalypse compendium
Peri appears in the upper areas of the Sky Tower, in the Firmament tunnels leading into the Eastern Kingdom of Mikado. She is the subject of the Challenge Quest "[Esc] Workplace Saftey" and will drop Red Incense Balls when defeated. Turning in 5 Red Incense Balls will complete the quest. Peri can teach Nanashi the Diarahan, Me Patra and Mediarama skills through her Demon Whisper. She benefits from learning Healing, Fire and Light spells.
Devil Survivor 2
"A fairy or a spirit of Persian lore with white, dove-like wings. They are often drawn as beautiful maidens. They eat fragrant scents such as musk, and when their blood dries, it is said to form a gem. They are skilled magic-users and can perform feats such as transformation, flight, and prophesying. They often help heroes with their magic, sometimes even becoming their wives."