original_query: What role does Edern ap Nudd play in Arthur's retinue and in the Battle of Badon against the Saxons?
query: What role does Edern ap Nudd play in Arthur's retinue and in the Battle of Badon against the Saxons?
answer: Edern ap Nudd is a member of Arthur's retinue and commands a Danish army in the Battle of Badon against the Saxons.