Jayanta

In Hindu mythology, Jayanta (, "victorious"), is the son of Indra, the king of the gods (devas) and his mother Shachi (Indrani). He resides in Svarga, the Hindu heaven, governed by Indra. He has a sister called Jayanti. He appears in various Hindu scriptures as fighting wars on behalf of the gods and his father. Jayanta also appears in the epic "Ramayana" and other lore, in which he disguises himself as a crow.
As a crow.
In the "Sundara Kanda" (fifth Book of the epic "Ramayana"), when Hanuman meets Sita, she narrates an incident that happened in the forest in Chitrakuta. The prince of Ayodhya and avatar of the god Vishnu, Rama is exiled to the forest with his wife Sita (an avatar of Vishnu's wife Lakshmi) and brother Lakshmana. A fatigued Rama was sleeping in the lap of Sita, when a crow attacked her. The crow pecks at her twice; once on her breast or between her breasts in some versions. The "Ramcharitmanas" replaces the breast with feet. In hurry to drive away the crow, she tries to fasten her garments, but ends up loosening them. Rama is awakened and recognizes the crow whose claws were dripping in blood as the son of Indra. An enraged Rama, at the behest of Sita, picks a blade of grass and unleashes the divine weapon Brahmastra out of it on the crow, who flees in fear. The crow flies across the universe, but the weapon follows. Turned back by Indra, Brahma, Shiva and rishis (sages), the crow takes refuge in Rama and surrenders to him. The son of Indra requests pardon, but Rama says that the Brahmastra cannot be withdrawn. So, the son of Indra asks it to hit the crow's right eye, and he is left half-blind. While Jayant is not explicitly named in the episode, various commentaries on the epic like the "Tilaka" and the "Bhushana" by Govindaraja identify Jayant as the "son of Indra"; some other commentaries do not identify any individual son of Indra. Govindaraja says only Jayant is known as the son of Indra.
Besides the "Ramayana", Jayant is said to have assumed the form of the crow in some tellings of the Samudra manthan episode. A pot of "amrita" (elixir of life) emerged from the churning of the ocean by the gods and the demons. The demons seized the pot, but Jayant took it from them in the guise of a crow. Pursued by the demons, he flew for twelve days without rest. He stopped at four locations on earth: Prayag (in modern Allahabad), Haridwar, Ujjain and Nashik, where the Kumbha Mela is celebrated every twelve years in remembrance of the incident.
Fighting on behalf of the gods.
The last Book "Uttara Kanda" of the "Ramayana" describes a battle between Indra and the rakshasa (demon) king Ravana. While Indra battles Ravana, Jayanta fights with Ravana's son Meghanada. A fierce battle ensues between Jayanta and Meghanada; ultimately Ravana's son strikes Jayanta, who falls unconscious. In the confusion, Puloman, his maternal grandfather, takes Jayanta away from the battlefield, unseen by anyone and hides him in the ocean. Indra presumes Jayanta dead and fights more powerfully, but Meghanada defeats him too.
Jayanta is also described to fight in the battle between the gods and asuras (demons) in the "Padma Purana". The "Harivamsa" mentions the battle between Indra and the god Krishna to acquire the celestial tree Parijat from Indra's heaven. Jayanta is described battling Krishna's son Pradyumna and is defeated. In the "Skanda Purana", Jayanta is defeated by the asura Surapadman, who is finally killed by the commander-in-chief of the gods, Skanda.
Other legends.
The "Vayu Purana" narrates a tale wherein Jayanta is cursed and turned into a bamboo. This tale is also told in context of devadasi lore with some variation. Once the sage Agastya arrived in Indra's court and was welcomed by Indra, by organizing a dance performance of the apsara Urvashi. In the performance, Urvashi and Jayanta looked in each other's eyes in love. The distracted Urvashi missed the beat and the dance went haywire. An agitated Agastya cursed Urvashi to be born on earth as a devadasi and Jayanta to be a bamboo tree in the Vindhya mountains. The duo bowed in reverence and prayed for mercy. The sage said that the curse will end when Urvashi will be presented with a "talaikole" (a bamboo staff, Jayanta) on her dance debut ("Arangetram"). As ordained, the lovers were released from the curse and returned to heaven, when Urvashi got united with Jayanta as the bamboo staff.