ROMUALDO CASTILLO aka ROCA is a charismatic multilingual actor best known for his performances in the CBS's prime time TV Shows "NCIS HAWAII" as William Strafford, "MAGNUM P.I" as Christophe Midi and "HAWAII FIVE-O" as Guillermo and Koslov. He was raised in France and Spain and then went on to study in England. He Lived in Hawaii for 10 years and now currently resides in Los Angeles where he is constantly working on his craft with acting coach of the stars Ivana Chubbuck. He is fluent in English, French, Spanish and conversational in Italian and Portuguese.