The oldest of the Great Old Ones and a mentor to Will, his longstanding battle against the Dark demonstrates both sagacity and the complexities of moral leadership.

Once a devoted companion to Merriman, he struggles with loyalty and betrayal, leading to complex alliances that span centuries.

Will’s oldest brother, whose life of globe-trotting adventure offers Will a vision of adulthood and independence distinct from their family home.

The second oldest brother known for his artistic nature, reflecting the family's creative inclinations.

Will’s oldest sister, who takes on nurturing and household roles within their large family.

The twin brothers of Will, with Robin being more athletic and Paul a musical prodigy, both contributing to the family’s artistic environment.

A mostly background character among Will's siblings, mentioned sparingly throughout the narrative.

The sister closest in age to Will, she exhibits traits of typical teenage behavior and unwittingly complicates Will's life due to external influences.

Will's immediate older brother who shares a close bond through their mutual participation in music and church choir activities.

A formidable opponent of the Great Old Ones, representing the seductive power of the Dark with shifting identities across the series.