Constant appears in ’s second tale (II, 7), where he is the son of the Emperor of Constantine and the ’ brother-in-law. When the ’s allies attack Athens in revenge for the murder of the Prince, Constant supports the Duke. But he also ends up falling in love with and takes advantage of the Duke’s absence to turn his responsibilities over to his nephew , return to Athens, kidnap her and take her to an island near Turkey. Subsequently, he himself is kidnapped by .