Character Relationship Map: The Pool

Characters

• Sarah (played by Kristen Miller) — protagonist

  American student and Greg's girlfriend who becomes a central survivor. She navigates the water park with the group, escapes through air ducts, helps lock up Greg, and ultimately kills the killer Frank...

• Carmen (played by Elena Uhlig) — supporting

  German student who survives multiple killer attacks alongside the group. After being injured by the killer in the filter chamber, she retrieves a security guard's gun and successfully shoots Frank to...

• Greg (played by Thorsten Grasshoff) — supporting

  Sarah's boyfriend who organizes the water park break-in. He later locates Chris, gets knocked unconscious by Carmen when mistaken for the killer, and eventually fights Frank in the pool before being s...

• Chris (played by Jonah Lotan) — supporting

  Member of the graduating group who stays behind when the others crawl through the air vent. He is later found terrified by Greg and Diego before the final confrontation.

• Mel (played by Cordelia Bugeja) — supporting

  One of the graduating students who partners with Martin to have sex in the weight room. She is chased into a locker room by the masked killer and murdered while Martin is away.

• Mike (played by James McAvoy) — supporting

  Scottish student and Kim's boyfriend. After deciding not to attend the party initially, he later joins the group at the water park and meets his end when the killer drives a machete through the air du...

• Diego (played by Maximilian Grill) — supporting

  Argentine student who waits with Chris when Greg enters the air duct to find an exit. He later accompanies Greg back to locate Chris before the climax.

• Martin (played by Jason Liggett) — supporting

  American former student and water park employee who grants the group access. He leads the escape attempt through the air vents but is killed when the killer stabs through the duct he is crawling throu...

• Frank (played by John Hopkins) — supporting

  English student who is revealed to be the masked killer. Driven by jealousy and failed romantic advances, he systematically murders the group. He is eventually set on fire by Sarah, stabbed in the wat...

• Kim (played by Isla Fisher) — supporting

  Australian student and Mike's girlfriend. Overwhelmed by academic failure and feeling like an outcast, she skips the water park party and is later ambushed in the woods by the masked killer, who stabs...

• Svenja (played by Linda Rybová) — minor

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Mike → Kim (Romantic Boyfriend) — Mike supports Kim before her isolation and murder.

  Kim and Mike are described as boyfriend and girlfriend, and they swim together at a lake.

• Sarah → Greg (Romantic Boyfriend) — Their relationship connects Sarah to the group's dangerous nighttime expedition.

  Sarah is identified as Greg's girlfriend, and Greg organizes the water park break-in for the group.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Frank → Svenja (Conflict Murderer And Victim) — Frank weaponizes the slide against Svenja.

  The killer drives a machete through the bottom of the water slide as Svenja descends, fatally injuring her.

• Frank → Kim (Conflict Murderer And Victim) — Frank's attack ends Kim's storyline before the water park sequence.

  Kim is ambushed in the woods by the masked killer and stabbed to death.

• Frank → Mel (Conflict Murderer And Victim) — Mel becomes one of Frank's victims during the locked-in hunt.

  The masked killer chases Mel into a locker room and kills her while Martin is away.

• Frank → Carmen (Conflict Murderous Enemy) — Their confrontation directly determines Frank's death.

  Frank stabs Carmen near the filter chamber and throws her back into it, but Carmen later shoots him.

• Frank → Sarah (Conflict Murderous Enemy) — Their conflict drives the final confrontation.

  Frank reveals himself as the masked killer, attacks Sarah, and is ultimately stabbed by her with a broken bottle.

• Greg → Diego (Alliance Survival Ally) — They coordinate during the late-stage search for survivors.

  Diego waits with Chris while Greg enters the air duct, and later accompanies Greg when they return to locate Chris.

• Carmen → Chris (Alliance Search Partner) — They investigate the first water park murders together.

  Carmen and Chris discover the bodies in the small pool and search for the rest of the group.

• Sarah → Mike (Alliance Group Ally) — They cooperate during the group's response to the murders.

  Sarah and Mike are among the survivors who intercept Martin and later attempt to escape through the air ducts.

• Sarah → Carmen (Alliance Escape Partners) — Their cooperation forms the central survivor alliance.

  Sarah and Carmen crawl through a separate duct, hide in the security monitor room, and attempt to escape together.

• Greg → Martin (Alliance Break-In Partners) — They make the group's unauthorized entry possible.

  Greg plans to enter the indoor swimming complex with Martin, who works at the water park and provides access.

Story Analysis

A graduation celebration becomes a locked-in survival struggle against a jealous killer hidden within the student group.

Plot Progression

1. Graduation Under Threat — The students graduate and plan a celebration at a closed water park. Kim's academic distress and later murder introduce the hidden danger surrounding the group.
2. The Forbidden Celebration — Greg and Martin give the students access to the water park, where they drink and swim. The celebration turns horrific when Carter and Svenja are killed by the masked attacker.
3. Trapped Among the Pools — Mel is murdered, and the survivors discover that exits, keys, and phones have been compromised. Martin proposes the air duct as their only apparent escape.
4. The Failed Escape — The survivors crawl through the ducts while the killer attacks from below. Mike and Martin die, leaving Sarah and Carmen to navigate the building alone.
5. The Killer Unmasked — Carmen is attacked near the filter chamber, while Sarah learns that Frank is the masked killer. The surviving characters fight him in the pool until Carmen delivers the final shot.