Prasert Prasertvithyakarn (Thai: ประเสริฐ ประเสริฐวิทยาการ), born November 5, 1983 in Bangkok, Thailand, is a Thai game designer who worked for Square Enix.
Prasertvithayakarn graduated from Chulalongkorn University in Bangkok and moved to Japan to work in the video game industry. He worked on Majin and the Forsaken Kingdom (2010) before joining Square Enix. His first project was Lightning Returns: Final Fantasy XIII (2013). He was one of the lead game designers for Final Fantasy XV (2016). In January 2021, Sun announced that he had resigned from Square Enix, and Luminous Productions.  Due to his difficult to pronounce name, Prasertvithyakarn was called "Sun" by his teammates.
Works within the series
|Lightning Returns: Final Fantasy XIII||2013||Music: Bard in Yusnaan and Dead Dunes|
|Final Fantasy XV||2016||Lead Game Designer (Party AI System)|
|2017||Director (Assassin's Festival)|