A passenger aboard the salvage tug who joins Turner in exploring the wreck, survives the disaster alongside the main group, and ultimately forms a romantic partnership with him.
They cooperate within the survivor group during the ascent and escape.
Celeste and Frank become members of the survivor group moving through the flooded Poseidon and later escaping toward the tugboat.
Celeste and Harold share the same endangered survivor group.
Harold is found aboard the Poseidon and subsequently joins the group that includes Celeste during its escape through the wreck.
They cooperate as members of the escaping survivor party.
Larry is found among the survivors, later arms himself with Turner and Frank, and proceeds with Celeste's group toward the surface.
Doyle belongs to the hostile force opposing Celeste's escape.
Doyle works with Svevo's crew, which attempts to prevent the survivor group from leaving the Poseidon while Celeste is part of that group.
Explore the full interactive character relationship map of Beyond the Poseidon Adventure