Guillaume Menguy. Guillaume Menguy was >> in The Echo of Reason as 'William'.Izac Brighenti. Izac Brighenti was >> in The Echo of Reason as 'Sébastien'.Romain Le Tallec. Romain Le Tallec was >> in The Echo of Reason as 'Pablo'.Mélissandre Paliscot. Mélissandre Paliscot was >> in The Echo of Reason as 'Héloïse'.Mathieu Le Breton. Mathieu Le Breton was >> in The Echo of Reason as 'Noémie's father'.Nelly Gandolfo. Nelly Gandolfo was >> in The Echo of Reason as 'William's mother'.Benoît Coutant. Benoît Coutant was >> in The Echo of Reason as 'William's father'.Lilian L'haridon. Lilian L'haridon was >> in The Echo of Reason as 'Assistant Director'