Leanan Sidhe

Leanan Sidhe (リャナンシー, Ryanan-shii) is a recurring demon in the series.

Appearances

 * Devil Summoner: Soul Hackers: Kijo Clan
 * Devil Summoner: Raidou Kuzunoha vs. The Soulless Army: Skill Class
 * Persona 3: Empress Arcana
 * Persona 3: FES: Empress Arcana
 * Persona 4: Lovers Arcana
 * Shin Megami Tensei: Strange Journey: Femme Race
 * Persona 4: The Animation 

History
In Celtic folklore, the Irish leanan sídhe is a beautiful woman of the Aos Sí (or fairy folk) who takes a human lover. Lovers of the leanan sídhe are said to live brief, though highly inspired, lives.

The leanan sídhe is generally depicted as a beautiful muse, who offers inspiration to an artist in exchange for fame and glory; however, this exchange frequently results in madness for the artist, and often premature death.

They seek the love of mortals. If they refuse, she must be their slave; if they consent, they are hers, and can only escape by finding another to take their place. The fairy lives on their life, leaving the object of a Leanan Sidhe's affection to waste away.

The name comes from the Gaelic word "leannan", a sweetheart, concubine, or favourite. Also, Sídhe, "of the fairy mounds".

Persona 3 Portable
Available once the protagonist reaches Level 33. It is of the Empress Arcana.

Persona 4
Available once the protagonist reaches Level 42. As with all Persona of the Lovers Arcana, it can only be acquired through Fusion.

Persona 4 the Animation
Leanan Sidhe was used by Yu in Episode 12. She was used to cast a spell through Shadow Mitsuo's Ear by a whisper, possibly Foolish Whisper or Tentarafoo, to bewilder and enrage Shadow Mitsuo.