Gregor's lovable two-year-old sister whose innocence and joy bring light to the darkness of the Underland. Her kidnapping triggers the adventure, and her presence serves as a motivation for Gregor.

A steadfast bat bonded to Gregor, whose strength and loyalty are crucial to the group's survival. Though initially mistrusted, Ares proves to be a devoted ally and friend.

An outcast rat with an extraordinary sense of smell, making her a valuable guide through the Labyrinth. Her sharp personality and unique abilities prove indispensable to Gregor's quest.

Luxa’s cousin and a skilled fighter, seafarer, and medic who plays a critical role in the group's safety. His courage and competence earn him the trust and respect of the group.

Initially perceived as a threatening figure due to a prophecy, but is revealed to be more complex upon discovery. His true nature challenges assumptions and reshapes the narrative's course.

A 14-year-old heir to the Underland throne, known for her bravery and leadership. She provides Gregor with insights into the Underland and demonstrates loyalty to her friends.

A mature and commanding protector who guides and trains Gregor as part of the quest. His leadership is characterized by a strong sense of duty and care for the group’s well-being.

A frail but insightful seer whose capacity to predict future events plays a vital role. Though often underestimated, her revelations and courage contribute significantly to the story's outcome.