Indra is the Hindu god of war, weather, lightning, thunder, rain and river flows, along with being the King of the gods or Devas and Lord of Svargaloka (Heaven) in Hinduism. He was the most important god in the Vedic religion and he later became a major figure in Hinduism and an important deity in Buddhism.
Indra is bestowed with a heroic and almost brash and amorous character. The formidable thunderbolt-wielding Indra strikes an imposing figure but as king of the gods he is generally benevolent, being generous to his worshipers, guaranteeing peace and prosperity and delivering beneficial rainstorms to end droughts. He can also be called upon in times of war to give support with his divine weapons and favorable intervention.
Mentioned first as the chief deity in the sacred Hindu text of Rig Veda, Indra is bestowed with a heroic and almost brash and amorous character. His signature weapon is Vajra. His favorite drink is the divine drink Soma which grants immortality. He was also in trinity with Varuna and Mitra. While his epithet Verethragna is a God of Victory and the two are identified as separate aspects. Indra's arch-nemesis is either the dragonVritra or the figure Indrajit.
He has always remained significant in Indian mythology, from Vedic to Puranic times, as the primary ruler of all devas, even as his reputation and role diminished in later Hinduism with the rise of the Trimurti. In Zoroastrianism, Indra is the name of an archdemon servant of Angra Mainyu whose eternal opponent is Asha. In Buddhism, he is the leader of the Four Heavenly Kings and is known as Sakra, or Taishakuten in Japan.
"Origin: India. The Hindu god of rain and thunderstorms. He is known as a war god who wields a thunderbolt known as Vajra. He rides the white elephant Airavata and defeated Vritra, who was causing a drought. He was later embraced by Buddhism and became Sakra, leader of the four Devas."
—Shin Megami Tensei A-Mode DDS Dictionary
Shin Megami Tensei IMAGINE
Indra acts as one of the five demons that controls the Pentalpha system. Players can align with him to fight against mobs representing the other demons within the system. Those fighting against him will face waves of demons belonging to the Goddess, Yoma, and Avian races.
By acquiring enough power for him, players can obtain the ability to fuse him in a special fusion of Ganesha and Zouchouten.
Megami Ibunroku Persona
Indra can only be created by using the Tora Stomachband Totem when fusing the Spell Cards from Hannya and Girimekhala.
Devil Children Red/Black
Indra is the leader of the Deva and leads them in their competition to see who will be the Maou of Marble Land. Indra is against the Rasetsu and Shura tribes taking over. He is the last ruler to battle Setsuna or Mirai and to be against them abdicating their rule of Marble Land. He is one of the three choices for becoming the new Maou.
DemiKids Light & Dark
"A cool and level-headed demon known for its quick and precise attacks."
Indra can perform the Light Combo Holy Attack with Midion, which deals damage to all foes for 25 MP. Indra can perform the Thunder combo Angry Skies with Makara and Trinos, which damages all foes and inflicts shock for 15 MP.
Digital Devil Saga: Avatar Tuner 2
Indra appears as the Atma Avatar of Roland. His signature weapon Vajra completely merges with his right arm but it is only used to attack while dealing critical damage, otherwise he simply extends the 2 chakras from his left hand for attack. The top half of his head is diminished into a concave shape which looks like a bowl. The blue diamond-shaped speckles dotting his body and converging on the lowest parts of his torso, legs and arms probably represent rainfall, referencing Indra's status as a god of storms.
Indra's arch-nemesis, Meganada appears in the story as well and instinctively hunts for Indra, causing Roland to flee.
In the novel adaptation Quantum Devil Saga, Indra doesn't exist, as Roland does not have an Atma.
Indra's prototype artwork as it appears in Kazuma Kaneko Works
Indra in Digital Devil Saga: Avatar Tuner 2
Indra's concept art from Digital Devil Saga: Avatar Tuner 2
Artwork from Devil Children Black Book & Red Book.
As he appears in Shin Megami Tensei IMAGINE
Indra as it appears in Card Summoner
The blue diamond-shaped speckles dotting Indra's body in Digital Devil Saga may be an allusion to the curseGautama placed on him as punishment for seducing his wife, which resulted in a thousand vulvas appearing on his body and later turning into eyes after bathing in the Gautami river.