Seventeen-year-old protagonist and Frank's son. Initially stays behind due to a storm, returns to rescue his father's team, helps navigate the flooding cave system, and is forced to mercifully drown his dying father before finding the way out to the ocean.
Frank is Josh's father and the expedition's lead diver, creating a deep familial bond tested by survival.
Josh and Victoria cooperate closely during the cave ascent, relying on each other for safety.
Josh and J.D. are teammates who attempt to escape the flooding cave together.
Josh and Liz work together to navigate the cave system and avoid the rising floodwaters.
Josh and Carl remain part of the same survival group despite Carl's psychological breakdown.
Explore the full interactive character relationship map of Sanctum