The Honest Challenger has the ability:
Action: During a conflict, initiate a duel - resolve the duel. The controller of the duel's winner moves a character from his or her home area to the conflict.
Question: if the opponent wins the duel, is the move in optional? For example, if I am defending against the Honest Challenger and win the duel, do I have the option to not move in another character into the conflict? Or is the move in mandatory?