Titus au Ladros is one of Darrow's classmates. He is in House Mars. Early in the book Darrow and he split loyalty in House Mars, with most loyal to Titus. He perpetrates acts of violence and rape at the Institute, for which he is tried and found guilty by Darrow later in Red Rising. When he is caught, Darrow almost executes him but then allows Cassius to duel him in single combat where Titus loses.