Special Guest Stars Matthew Mercer voices Rebel Matthew Mercer voices Whispered One Guest Stars Grey DeLisle Griffin voices Delilah Briarwood Esmé Creed-Miles voices Cassandra Gina Torres voices Keeper Yennen Dominic Monaghan voices Archibald Desnay Rory McCann voices Duke Vedmire Stacey Raymond voices Bryn Grey DeLisle Griffin voices Townsperson