Nakula was the fourth of the five Pandava brothers in the ancient Indian epic, the Mahabharata. He and his twin brother Sahadeva were the sons of Madri, one of the wives of the Pandava patriarch Pandu, and Ashvini Kumaras, the divine twin physicians of the gods, whom she invoked to beget her sons due to Pandu's inability to progenate. Nakula is described as the most handsome man of his lineage, and was renowned for his beauty, skill in swordsmanship and horse keeping.

The Pandavas is a group name referring to the five legendary brothers, Yudhishtira, Bhima, Arjuna, Nakula and Sahadeva, who are central figures of the Hindu epic Mahabharata. They are acknowledged as the sons of Pandu, the King of Kuru, but were fathered by different Devas (gods) due to Pandu's cursed inability to naturally conceive children. In the epic, the Pandavas married Draupadi, the princess of Panchala, and founded the city of Indraprastha after the Kuru Kingdom was split to avoid succession disputes. After the split, the other part of the kingdom was ruled by their cousins, the Kauravas. However, the Pandavas lost their kingdom to Duryodhana when Yudhishtira gambled it away during a game of dice. The bet Yudhishtira agreed to was that the Pandavas would hand the kingdom to the Kauravas and go into exile for 13 years. After this time the Kauravas refused to return the kingdom. As a result, the Pandavas waged a civil war against their extended family, and this conflict was known as the Kurukshetra War. With the help of the god Krishna, the Pandavas eventually won the war with the death of the Kauravas, albeit at great cost.