The son of Arjuna and Ulupi is Iravan or Aravan. According to Hindu mythology, Ulupi was a Naga princess who fell in love with Arjuna when he was in exile. Arjuna had also promised to marry Ulupi if he did not get married to Draupadi, his first wife, which he later did.
During the Kurukshetra war, Iravan fought on the side of the Pandavas and was known for his bravery and martial prowess. He was especially skilled in the use of the sword and was considered one of the greatest warriors of his time.
Iravan’s most significant contribution in the war was during the 18th day when he fought against the Kauravas and their allies. He was eventually killed by the Kaurava general, Alambusha, in a battle that lasted for hours.
Iravan is also known for his sacrifice during the Mahabharata era. According to the legend, he agreed to sacrifice himself to the goddess Kali to ensure the Pandavas’ victory in the war. This sacrifice is commemorated in the Aravan festival, which is celebrated annually in Tamil Nadu and parts of South India.