Amy's boyfriend and the group's de facto leader, known for his rational approach and problem-solving skills during their entrapment.

A German tourist who joins the group, notable for his pragmatic acceptance and resilience in the face of their dire situation.

Stacy's boyfriend, marked by impulsivity and paranoia, whose psychological and physical struggles drive much of the narrative.

Jeff's girlfriend and medical student, characterized by her optimism and denial of the harsh realities of their predicament.

A Greek tourist whose early injury renders him a passive figure, illustrating the physical consequences of the group's situation.

The primary human antagonists, who enforce the containment of the group, driven by necessity rather than malice.