Characters in The Hollow Hills

Arthur Pendragon

Also in The Last Enchantment, The Wicked Day, The Prince and the Pilgrim, Mary Stewart's Merlin trilogy

Merlin Ambrosius

Also in The Last Enchantment, The Wicked Day, Mary Stewart's Merlin trilogy

Uther Pendragon

Also in The Crystal Cave

Morgause

Also in The Last Enchantment, The Wicked Day

Igraine

Also in The Crystal Cave, The Last Enchantment

Merlin (Arthurian wizard)

Also in The Crystal Cave, The Last Enchantment, Mary Stewart's Merlin trilogy

Ralf

Also in The Crystal Cave

Ulfin

Also in The Crystal Cave, The Last Enchantment

Ector of Galava

Cador of Cornwall

Also in The Last Enchantment

Bedwyr of Benoic

Also in The Last Enchantment, The Wicked Day

Morgan Greer

Also in The Last Enchantment

Lot of Lothian

Also in The Last Enchantment