Patchanon Ounsa-ard, nicknamed Billy, is a Thai singer and actor. He is the leader of ZBURSTER (IMA INTER ACADEMY). He has a degree in Aerospace Engineering from Kasetsart University. Ounsa-ard began singing and dancing while studying at the university. Then, he was selected to do a final audition in Korea with Cube Entertainment, but at that time he was pursuing aeronautics at Kasetsart University's engineering faculty and his family wanted him to focus on studying.