Hideous!

Napoleon Lazar is a high-level corporate executive who treats oddities as premium assets to be traded for profit. He pursues the deal with sharp demands and a readiness to use force to secure control. Although he engages in a tense duel over the arrangement, the endgame reveals the lethal stakes of this mercenary world as he and Lorca are dissolved in acid.

Martin is a questionable water sanitation worker who discovers a strange fleshy organism in a tank and triggers the buy-sell scheme. He accepts a bribe from Belinda Yost to facilitate the transaction, serving as the catalyst for the illicit deal. His fate is tied to the scheme, but the summary does not specify his ultimate end.

Sheila is Lorca's assistant who helps move the operation along and participates in the ambush of Lazar. She is seen wearing a gorilla mask during the theft and later uses security overrides to maneuver the specimens. She escapes in Kantor's car, remaining a surviving agent amid the chaos.

Dr. Lorca is a rival buyer who leverages scientific know-how and deceit to bolster his own collection. He plots with Yost and Lazar and tries to outshine their trove by proving his dominance. In the castle confrontation, he engages in a sword duel with Lazar, but both end up dissolved in the acid bath.

Alf is one of the grotesque jar specimens central to the collection. He represents the alien, malformed lifeforms that populate the film's setting and intensify the sense of horror.

Belinda Yost is a ruthless seller of oddities who brokers the deal with Lazar and arranges the exchange through IMSI. She brings cash and contracts into play, but her pursuit of profit ultimately leads to her demise when she becomes entangled with a skeletal creature's spine-like hair.

Elvina is the receptionist at IMSI, depicted as incompetent and quick to reveal plans to others. She assists in coordinating the meet with Lazar and Lorca, and her actions connect the players to the castle’s dangerous setup. She dies after a perilous fall.

Kantor is a private investigator who tracks the theft of the specimens and probes the tangled relationships among the players. He assists in unraveling the scheme and ultimately leaves with Sheila in his car, surviving the perilous events.

Dougie is one of the grotesque jar creatures present in Lorca's collection, representing the unpredictable, dangerous nature of the specimens and their looming threat to the human characters.