A young brownie who is Firedrake’s closest friend, distinguished by her spotted sulfur-yellow fur and feline eyes. She is quick-tempered but loyal, providing sharp wit and companionship on the journey.

An orphaned boy living in an abandoned warehouse who joins Firedrake and Sorrel on their journey. He displays bravery and empathy, and his adventurous spirit makes him a central part of the quest.

A dragon-like antagonist created by an alchemist, he is large and powerful, with gold armor scales. His purpose is to hunt silver dragons, making him a formidable foe for Firedrake and his friends.

A homunculus created by the same alchemist that made Nettlebrand, Twigleg serves as Nettlebrand's spy but develops a bond with Ben. His actions are driven by self-preservation and the influence of Ben’s kindness.

A mountain dwarf who initially aids Nettlebrand for personal gain, motivated by his greed for treasure. He later shows interest in the beauty of the dragons' home, seeking refuge there.

A family of rats who help the protagonists, with Rosa giving an early warning, Gilbert providing directions, and Lola leading them successfully in the Himalayas. They demonstrate the impact small creatures can have on larger quests.

A family of academics knowledgeable about mythical creatures, with Professor Barnabas Greenbloom providing important support and mentorship to the protagonists. They embody an ideal family, offering Ben a sense of belonging and a home.