He was born Fidelio Delabajan Casas III.

His ‘star’ as a potential singer started when he sang at a student council election in Placer, Masbate. He was still a third grader back then. From that experience, he was confident enough to join singing tilts.

In Aquinas University of Legaspi, he pursued Business Administration, but had to quit due to financial constraints. When his sister asked him to come to Manila in, he did not let any opportunity pass by, he auditioned for Pinoy Pop Superstar, but it was only on his second attempt that he finally made it and joined the Year 3 of the said singing competition produced by GMA-7 and was hosted by Asia’s Songbird Regine Velasquez.

Among the many appearances on television he had, he specifically remembers those of that on Little Star on GMA-7 - portrayed Jiro Manio’s friend, Walang tulugan, Pilipinas Got Talent, Diz Iz It, ANC’s Morning Show, Eat Bulaga, Showtime (2010 and 2011), X Factor Philippines season 1 and was also a house singer for Singing Bee along with Apple Chiu, Michael Cruz, Led Soprepeña and Frenchie Dy. He also sang in Echoes of Dreams concert with Lea Salonga at the Araneta Coliseum.

Third also had a share of film exposure when he took on a lead role for an independent film produced by the National Youth Commission in 2008 and 2014.

Keith Urban’s ‘Stupid Boy’, Matt Kearney's 'Sooner or Later', Boyz II Men's 'Water Runs Dry', Il Divo's 'Nella Fantasia' and Michael Bublé’s ‘ ‘Always on My Mind’ are among his favorite songs.