He is the lead guitarist of the band Parokya ni Edgar[1] and is the oldest member of the group.
Semaña grew up in Mataasnakahoy, Batangas and attended Fine Arts in the University of the Philippines Diliman in Quezon City.
He, along with Vinci Montaner, are the only members of Parokya ni Edgar who have earned a bachelor's degree.
Semaña is a high school alumnus of Ateneo's rival school, De La Salle (Lipa City, Batangas branch), which serves as material for many of the band's running jokes in their songs.
He is a member of the Tau Gamma Phi fraternity in the Philippines along with bandmate Buwi Meneses.