A mysterious, seemingly immortal figure with supernatural abilities who arrives in a small Scottish town. He carries a notebook of names linked to deceased criminals and exhibits Old Testament-style retributive justice. He manipulates events to expose and punish the sins of the townspeople, including inducing suicides and revealing hidden truths. Ultimately, he acts as a divine judge and avenger, sparing only PC Rachel Heggie and forming a partnership with her to seek vengeance on the guilty.
Six assumes a judicial role, punishing Beswick for his hidden sins through psychological coercion.
Hume views Six as a threat due to supernatural revelations, leading to a lethal confrontation.
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