Christos Tresintsis is pianist - arranger - composer of the band ONIRAMA from 2002 until today. In 2005, he received his degree in fugue with honors from the Macedonian Conservatory of Thessaloniki and then studied in the composition classes of Christos Samaras and Thodoros Antoniou at the Neo Conservatory and the Macedonian Conservatory respectively. For a number of years he taught advanced theory in conservatories of Thessaloniki.

Founding member and executive of 'De Facto' for 15 years, collaborated with Stavros Kouyoumtzis, Theodosia Tsatsou, etc. As a member of Onirama, he collaborated with many artists, such as Elena Paparizou, Dionysis Savvopoulos, Loukiano Kilaidoni, Saki Rouva (Ace of Hearts Tour) and took part as a support act at Pink, Fly Beeyond Festival (Olympic Stadium, 2007), Lenny Kravitz ( Terravibe Park, Opening act, 2007), in the Opening Ceremony of the 'Special Olympics' (Kallimarmaro, 2011) and other important events. Since 1998, he has dozens of record entries as a performer, arranger or composer (De Facto, Onirama, Haris Alexiou, Antonis Remos, Andriana Babali, etc.), as well as orchestrating, composing, executive work in films, theater productions and television series.