Ugrashravas
Ugrashravas Sauti is a character in Hindu literature, featured as the narrator of the Mahābhārata and several Puranas including the Shiva Purana, Bhagavata Purana, Harivamsa, Brahmavaivarta Purana, and Padma Purana, with the narrations typically taking place before the sages gathered in Naimisha Forest. He is the son of Lomaharshana, and a disciple of Vyasa, the author of the Mahābhārata. Ugrashravas is a bard of Puranic literature.
The entire Mahābhārata epic is structured as a dialogue between Ugrasravas Sauti and sage Saunaka. The narration of the history of Bharata kings by sage Vaisampayana to Kuru king Janamejaya is embedded within this narration of Ugrasravas Sauti. Vaisampayana's narration in turn contains the narration of Kurukshetra War by Sanjaya, to Kuru king Dhritarashtra. Thus Mahābhārata has as a Story within a story structure.
Kisari Mohan Ganguli's English translation of the Mahābhārata begins by introducing Ugrasravas thus:
"Ugrasrava, the son of Lomaharshana, surnamed Sauti, well-versed in the Puranas, bending with humility, one day approached the great sages of rigid vows, sitting at their ease, who had attended the twelve year sacrifice of Saunaka, surnamed Kulapati, in the forest of Naimisha."