The youngest member of the Viking band and a fierce shield maiden, initially portrayed through Jack's misunderstandings of Viking culture. Her complex past and warrior spirit make her both an adversary and ally to Jack.

An Irish mentor to Jack who brings wisdom, magic, and guidance to the story. He plays a critical role in Jack's transformation and quest, providing wisdom and support along the way.

Jack’s younger sister, whose enchanting appearance and innocence drive much of the story's events. Her abduction by the berserkers serves as the catalyst for Jack’s adventure.

The formidable leader of the berserkers who kidnaps Jack and Lucy. He embodies both brutal strength and unexpected complexity, influencing Jack's understanding of honor and culture.

The story’s antagonist, a half-troll with the ability to manipulate and control others. Her actions and desires set many of the novel’s events in motion and challenge Jack’s beliefs and growth.