The Last to Drown Characters

Kaia is the grieving widow who takes the women's rafting trip down the Middle Fork of the Garnet, a trip she originally planned with her late husband Parker. She still wears her wedding ring and initially insists she is not there for healing but for Parker. As the trip turns deadly, she becomes a determined survivor, rowing through rapids, helping pilot the decoy raft, and fighting Lee alongside the other women.

Arc: Kaia begins in deep grief, even drawn to the dangerous water at Devil's Stairs, but over the course of the massacre she chooses survival and self-sacrifice. Guided by Parker's remembered voice, she helps defeat Leo and reaches the epilogue where she opens Parker's letter and begins to move forward.

• Parker — her late husband; his memory and imagined voice guide her
• Leo Marsden — the killer she first knows as guide Bryan and ultimately helps drown
• Macy — guide who rescues her and becomes a fellow survivor
• Allie — fellow passenger and decoy-raft partner
• Pam — fellow survivor who fights alongside her
• Deborah — fellow survivor and raft-mate
• Imani — fellow survivor she wants to keep alive
• Bambi — her dog, waiting at home and with her in the epilogue

Leo Marsden is the man who has been posing as Bryan, the newer guide on the rafting trip. He hides his expert river skills behind an inept 'Flip-Flop' persona while actually being the Camas Creek survivor who, according to the true-crime theory Allie uncovers, committed the original massacre and changed his name. He sabotages the trip, murders guides and guests, strings razor wire across Anvil Falls, and hunts the surviving women because he wants credit for his crimes.

Arc: Leo is revealed as Bryan and chases the survivors down the river, taunting them and setting traps. He is tricked by the dummy raft, confronted at Splinter Ridge, knocked off balance by Macy, and drowned by Kaia, Macy, and Pam.

• Kaia — survivor he hunts and nearly kills
• Josh — guide he stabs to death after Josh intervenes to save Kaia
• Gracie — guide he murders at Camas Creek camp
• Macy — guide who strikes him with an oar and helps drown him
• Allie — woman whose true-crime community he mocks and whom he shoots
• Cindy Marsden — his mother; according to Allie's researched theory he killed her at Camas Creek
• Adrian — boss who gave him a guiding job under the alias Bryan

Parker is Kaia's late husband, an outdoorsman and explorer who died after becoming trapped in the cave called Cookie Dough. He appears only in memory, dreams, Kaia's imagination, and as a voice she hears during life-threatening moments. Before his death he promised to come back as a hawk and left a letter for Kaia saying she is his person.

Arc: Though dead before the story begins, Parker changes from a source of unbearable grief into a guiding presence that helps Kaia survive. His voice warns her about the razor wire, tells her not to give up, and gives her the 'let the paddles do the work' message that becomes the decoy plan.

• Kaia — his wife; he still calls her babe in her memories and dreams
• Raymond — his friend whose dirt-bike wire accident informs his warning
• Bambi — the dog in Kaia's care after his death

Macy is a senior guide on the trip who studies recreation therapy and believes rafting is medicine. She co-leads introductions, gives safety instructions, and initially tries to control panic when the satellite phone disappears. After being knocked from her raft at Anvil Falls, she survives, rows through the night, rescues the other women, and takes the lead in the final confrontation with Leo.

Arc: Macy starts as a responsible guide trying to keep the group calm, then becomes separated and presumed lost. She returns as the group's strongest guide, fighting Leo and helping drown him, and in the epilogue is recovering with facial surgeries.

• Kaia — rescues her and later pulls her into the safety raft
• Gracie — fellow senior guide and close friend murdered by Leo
• Josh — fellow guide she argued with about telling the scary story
• Leo Marsden — killer she fights with a guide oar and helps drown
• Adrian — her boss who dismissed her concerns about Bryan
• Imani — injured survivor she protects and tells not to row

Allie is a high-school librarian and true-crime enthusiast who moderates a big subreddit about the Camas Creek case. From the start she asks suspicious questions about Camas Creek and Kellen Stroop, and she carries repressed grief over a failed IVF round. During the attack she becomes a key survivor who reveals the Reddit-sourced theory that Bryan is actually Leo Marsden.

Arc: Allie begins as an obsessive true-crime fan whose fears are dismissed, then struggles with guilt for not recognizing Bryan earlier. She risks herself as Kaia's decoy-raft partner and is shot by Leo's last arrow, but survives and plans in-vitro treatment in the epilogue.

• Kaia — companion in the decoy raft and fellow survivor
• Nikki — close friend on the trip, later killed at Anvil Falls
• Leo Marsden — killer she identifies as the real Camas Creek murderer
• Pam — fellow survivor who comforts her
• Deborah — fellow survivor who briefly blames her for the attack

Josh is an older senior guide who nicknames Bryan 'Flip-Flop' and tells the terrifying Camas Creek campfire story. He is confident and physical, earning the nickname 'River Jesus' when he cliff-jumps. During the night attack at Camas Creek he tries to protect the women and intervenes to save Kaia from Bryan, but Bryan stabs him in the throat.

Arc: Josh begins as a fun, story-telling guide who enjoys suspense, then becomes a victim of the killer he once teased. His warnings about the river and rapids are remembered by the survivors afterward as they navigate downstream.

• Kaia — guest he guides and ultimately dies trying to save
• Leo Marsden — new guide he nicknamed 'Flip-Flop' and who kills him
• Gracie — fellow guide with whom he exchanges a shy smile
• Macy — fellow senior guide
• Allie — guest he silences when she brings up Camas Creek

Gracie is a young senior guide studying recreation therapy alongside Macy. She helps deliver the safety talk and is part of the guiding team. She is murdered in her tent at Camas Creek before the full attack unfolds, and Pam later discovers her body.

Arc: Gracie does not survive; her death is the first clear sign that the threat is real and triggers the women's flight downriver.

• Macy — fellow senior guide and 'might as well be sister'
• Josh — fellow guide she smiles at shyly
• Leo Marsden — killer under the alias Bryan who murders her

Pam is a practical, warm passenger who points out mountain goats early in the trip. As the crisis unfolds she helps restrain Deborah, bandages Imani's arm, builds the dummy rafters, and keeps her head during the Splinter Ridge confrontation. She survives the attack and later drives through the night to support Imani.

Arc: Pam moves from cheerful observer to essential survivor, showing craftiness and resolve under pressure. In the final fight she helps drown Leo and escapes downriver in the kayak with Kaia.

• Kaia — fellow survivor who escapes with her in the kayak
• Deborah — woman she holds back from recovering her sister's body
• Imani — friend whose arm she bandages and later drives to support
• Macy — survivor she swims beside and helps guide toward the portage trail
• Leo Marsden — attacker she fights and helps drown

Deborah is a divorced mother who is taking the rafting trip with her sister Beth as a bucket-list gift from her daughters. She is outspoken, encouraging, and emotionally open, giving Kaia a 'motherly squeeze' and cheering 'Atta girl.' She is devastated when Beth is killed by the razor wire at Anvil Falls.

Arc: Deborah begins as one of the most sociable passengers, then is forced to process her sister's death while continuing to survive. She helps pull Imani from the water, supports Imani while swimming, and joins the other survivors in defeating Leo.

• Beth — her sister, killed at Anvil Falls
• Kaia — fellow rafter and confidante
• Imani — injured survivor she pulls from the water and supports
• Pam — fellow survivor who physically restrains her
• Allie — fellow survivor and raft-mate
• Leo Marsden — killer who shoots her in the shoulder

Imani is a passenger who left her husband and seven-year-old twin boys at home. She jokes about risk early in the trip, but after the massacre she is severely injured, losing part of an arm and needing a tourniquet. Although she cannot row and admits she cannot swim, she keeps a faint spark of humor and fights to survive.

Arc: Imani becomes one of the most wounded survivors and must rely on the other women for physical support. She is rescued from the water, carried through the rapids, and in the epilogue is healing slowly while her husband has left her.

• Kaia — fellow survivor Kaia is determined to protect
• Deborah — pulls her into the raft and later supports her in the water
• Pam — bandages her arm and provides comfort
• Macy — guide who shields her from Leo
• Allie — offers to swim for both of them

Nikki is a true-crime-obsessed passenger who gossips with Allie about the Camas Creek murders and the movie about them. She panics when the satellite phone goes missing and interprets it through the old case. She is later killed at Anvil Falls by Leo's razor wire, her mouth cut ear to ear.

Arc: Nikki does not survive; her death gives Allie a personal stake in the horror and confirms that the group is being hunted.

• Allie — close friend, tentmate, and fellow Camas Creek enthusiast
• Leo Marsden — killer who kills her with the razor-wire trap

Beth is Deborah's sister and travel companion on the rafting trip. She is present during the early camp scenes but has little individual focus. She is killed by the razor wire strung across Anvil Falls while riding in the first raft.

Arc: Beth dies at Anvil Falls, and Deborah tries unsuccessfully to pull her body into the raft before being forced to leave her behind.

• Deborah — her sister, who tries to recover her body

Kellen Stroop is the figure associated with the original Camas Creek massacre. In Josh's campfire story, Stroop is the killer who murdered fifteen people before Leo Marsden killed him. Later Allie reveals a Reddit-sourced theory that Stroop was actually a victim and Leo Marsden was the real killer.

Arc: Stroop has no present arc; he exists as a true-crime legend whose story is revised over the course of the novel.

• Leo Marsden — the man who, according to the revised theory, framed or replaced him as the killer

Raymond is remembered by Kaia as Parker's friend who went dirt biking in Virginia and hit a wire trap. He barely survived but was later taken off life support. His memory becomes important when Parker's voice warns Kaia about the razor wire at Anvil Falls.

Arc: Raymond does not appear in the present; he only exists in Kaia's memory as a cautionary example of death by wire.

• Parker — his friend

Adrian is Macy's boss at the rafting company. Macy remembers that Adrian dismissed her complaints about Bryan, insisted Bryan be given a chance as a guide, and mentioned a top-secret news article featuring the crew. Macy later suspects Adrian may have known Bryan's true identity.

Arc: Adrian never appears in the river scenes; he is only recalled as part of the backstory explaining how Leo got hired under the alias Bryan.

• Macy — her boss
• Leo Marsden — gave him work as Bryan despite Macy's warnings

Cindy Marsden is Leo Marsden's mother in the backstory Allie pieces together. She is described as a successful, glamorous CEO who supposedly planned to send Leo to a wilderness bootcamp. According to the Reddit theory, she was killed during the Camas Creek massacre, and the online account OneSadRealm posted graphic images of her.

Arc: Cindy does not appear in the present; she exists solely through Allie's researched theory about Leo's past.

• Leo Marsden — his mother and alleged victim

Bambi is the dog who lives with Kaia and appears in the domestic scenes that bookend the river trip. She is left behind during the rafting trip but is present at the end when Kaia opens Parker's duffel bag. In the final chapter she rests her head on Kaia's knee and sits with her afterward.

Arc: Bambi does not change over the story; her presence is a quiet anchor as Kaia begins to process Parker's death.

• Kaia — her owner
• Parker — the dog that stays in Kaia's life after his death