According to Inca mythology, Inti is the sun god, as well as the patron deity of the Inca Empire. His exact origin is unknown but the most common story states that he is the son of Viracocha, the god of civilization.
Inti can teach Nanashi the Maragion and Mabufula skills through his Demon Whisper. He benefits from learning Fire and Ice skills.
Devil Survivor 2
"The Inca god of the sun, revered as a creation god. He and his wife, the moon goddess Mama Quilla, were worshiped as great gods and loved by the Incas. The Inca king Manco Capac was said to be Inti's son, and was also worshiped as a sun god."