The City of Lost Children

Krank cannot dream himself, which causes his body to age rapidly. By extracting dreams from kidnapped children using his specially designed machine, he hopes to experience dreams and potentially achieve immortality. The children's dreams serve as a substitute for his own missing oneiric function.

Earlier scenes establish that Krank is visibly aged and lives in seclusion, hinting at his desperate need for dream extraction.

The amnesiac diver is actually the original scientist who created Krank and the other inventions on the oil rig. After being assaulted by Krank and Martha and thrown into the water, he lost his memories. When Irvin sends out a bottled dream plea for help, it triggers the diver's recollection of his past identity.

The diver's unexplained presence underwater and his mysterious knowledge suggest a deeper connection to the oil rig.

Miette enters the dreamscape voluntarily, knowing she must deceive herself to enter. Inside, she confronts Krank and offers to replace Denrée as his source of dreams. When Krank becomes arrogant believing he controls the dream, Miette manipulates it into an endless loop that destroys his psyche, freeing Denrée in the process.

Irvin tells Miette she must delude herself to enter the dreamscape, establishing the rules of this realm.

The Cyclops is a cyborg cult that kidnaps children from the port city on behalf of Krank. In return for delivering these children, they receive mechanical body enhancements like eyes and ears. They serve as his primary method for acquiring victims to feed his dream-extracting machine.

Early scenes show Cyclops members receiving bionic upgrades after capturing children, establishing this transactional relationship.

The diver suffered amnesia after being assaulted by Krank and Martha and thrown into the harbor. The traumatic physical attack, combined with near-drowning, erased his memory of being the scientist who created the oil rig's inhabitants. He only regains these memories when exposed to the bottled dream broadcast by Irvin.

The initial encounter between the diver and Miette shows his confusion about his own identity.

Marcello initially rescues One because the Octopus coerces him using his stolen fleas. Later, after seeing Miette alive at the bar, Marcello is consumed by guilt for not saving her properly. This guilt compels him to allow One to accompany Miette and ultimately assists them in escaping the Octopus's chaos at the pier.

The scene at the bar shows Marcello's visible guilt after Miette reveals she's alive.

After a brutal encounter leaves the carnival manager wounded, One is coerced by the Octopus gang into performing the heist. They leverage his situation and likely his strength as their muscle. One's primary motivation is finding Denrée, so he complies hoping the heist might lead him to his kidnapped brother.

The Octopus's recruitment of One happens immediately after the carnival violence, showing opportunistic timing.

The six identical clones are creations of the missing scientist who also made Krank. They appear to be innocent beings living in the rig's environment. One clone, manipulated by Irvin, helps broadcast the distress signal that reaches One and Miette, playing a crucial role in the story's resolution.

The clones are introduced early as part of the oil rig's strange inhabitants, showing their passive nature.

Miette defeats Krank by exploiting his arrogance. She convinces him she will serve as his dream source willingly, making him believe he's in control. Once inside the dream, she transforms it into an infinite loop that traps Krank in his own mind, causing his psyche to collapse while freeing Denrée.

Krank's arrogance about never dreaming and his eagerness to experience dreams through others sets him up for manipulation.

The diver, having regained his memories as the creator of Krank and the rig's inventions, wants to destroy his monstrous creation. He fastens explosives to the rig's leg, intending to kill himself and end the nightmare he created. However, a seabird accidentally triggers the mechanism before he can be rescued, causing the explosion.

The diver's determination to return to the rig and stop Krank shows his resolve to rectify his past mistakes.

Irvin is a preserved human brain kept in a vat, one of the scientist's creations on the oil rig. Despite his limited physical form, he possesses intelligence and agency. He manipulates the clones and ultimately sends out the bottled dream plea for help, which triggers the rescue mission and restores the diver's memories.

Irvin appears early as one of the strange inventions, observing events from his vat.

Denrée is valuable to Krank because he is a child whose dreams can be extracted. Like all kidnapped children, Denrée's oneiric energy fuels Krank's attempt to experience dreams and slow his aging. His significance to One also makes him a strategic pawn in the overall conflict.

Denrée's abduction is shown early as the catalyst that drives One's quest.

The Octopus uses Marcello's stolen fleas to induce violent rage in One, causing him to attack Miette. When Miette cries, her tear triggers a dramatic chain reaction that directs a passing ship to crash into the pier. This chaotic event saves Miette from One's aggression and allows the group to escape in the confusion.

The Octopus's fleas were established earlier as weapons that induce specific behaviors.