Bishamonten

Bishamonten (ビシャモンテン, bishamonten) is a recurring demon in the Shin Megami Tensei series. He is depicted as the strongest of the Four Heavenly Kings, usually under the service of Taira no Masakado. In the Persona franchise, Bishamonten appears as a mid to high level Persona, capable only to summon once players reached a high enough level.

History
Bishamonten (毘沙門天) is one of four figures placed at the corners of the main altar in a Buddhist temple. These figures correspond to the four cardinal directions, with Bishamonten representing the north. Bishamonten originated as a deity in Indian mythology and came to Japan with many attributes: guardian of the realm of the North, guardian of Buddhist law, god of victory in war, and god of wealth and good fortune.

Appearances

 * Shin Megami Tensei: Kishin Clan
 * Shin Megami Tensei III: Nocturne: Kishin Clan
 * Persona 2: Eternal Punishment: Hermit Arcana
 * Persona 3: Tower Arcana
 * Persona 3: FES: Tower Arcana
 * Shin Megami Tensei: Devil Survivor: Kishin Clan

Shin Megami Tensei III: Nocturne
Bishamonten appears as an optional boss twice, first at the Temple north of Ueno Park after finding the Kimon Sphere, and second in the Bandou Shrine. After the first fight, the player will receive the Gundari Magatama, and Bishamonten will tell the player to collect all of the Magatama and find him again with  his master. He appears again in the Bandou Shrine as the last deva protecting the pillars of Masakado's Tomb.

Persona 3
Bishamonten appears as a high level Persona of the Tower Arcana, only being able to be summoned once the  Protagonist reaches level 60. Oddly, his in-game appearance looks more the artwork of Indra than the other Heavenly Kings.

Shin Megami Tensei: Devil Survivor
Bishamonten appears as a high level demon. He is a boss that must be fought on day 7 (except on Yuzu's route).