Sorcor is a broad, strong man, once mistaken for a ship's captain by Wintrow Vestrit. He is uneducated but highly intelligent, capable of doing complex mathematics in his head. Aboard the Marietta he is the only person able to navigate a chart outside of Kennit. Sorcor is often underestimated by his captain, who takes three years to even realize that Sorcor is passionate about something.
A former slave himself, he is virulently anti-slavery; he is the source of Kennit's decision to work at dismantling the slave trade. Despite being a pirate, Sorcor is generally a good person, good-hearted and sympathetic to those in need. He even comes to view Wintrow Vestrit with almost paternal toleration. He is firmly devoted to his wife Alyssum, and fiercely loyal to and defensive of Kennit, who he believes he is incredibly close to, often referring to their "friendship".
Sorcor is approached by Kennit and listens to his casual musings on the need for a unified pirate community. To Kennit's surprise, Sorcor firmly rejects the notion of a pirate king and insists that Divvytown and other pirate communities would never follow a single leader.
Kennit approaches Sorcor again to raise the idea of attempting to capture a liveship. Sorcor is skeptical of the attainability of this goal. He suggests that Kennit include the dismantling of the slave trade as part of his mission to control ship traffic and trade through the Pirate Isles. Sorcor's passion convinces Kennit of the usefulness of this plan, and they strike a bargain: Sorcor will rally the other men to Kennit's cause, and Kennit will attack and free one slaver for every liveship he chases. Freeing slaves thrills Sorcor, and he becomes more devoted than ever to Kennit.