An 18-year-old half-Mexican girl who is Shy's fellow crewmate and friend. She and Shy bond over shared experiences, and she remains confident despite enduring class-based discrimination.

The daughter of a wealthy family, initially treating Shy with disdain but later becoming his ally. Her friendship with Shy grows as they are forced to rely on each other for survival.

Shy's cabin mate on the cruise ship, a tall lineman with a dream of becoming a famous chef. He is characterized by his strength and affectionate nature.

An enigmatic older man working as a shoe shiner on the cruise who reveals a surprising past. He plays a key role in saving Shy multiple times with his resourcefulness and bravery.

A wealthy Texan oil tycoon who shows a different side of himself when sharing a lifeboat with Shy. He evolves from making discriminatory remarks to displaying humility and compassion.

A security officer hired to monitor Shy, with a mission to protect corporate secrets. He remains a dangerous adversary despite having his life saved by Shy.

The owner of a powerful biotechnology company and key antagonist, portrayed as having a significant impact on the events leading to Shy's hardships. His actions drive much of the conflict.

The lead scientist responsible for creating a catastrophic virus, struggling with the consequences of his actions. His earlier achievements in medicine contrast with his later ethical downfall.