A 17-year-old girl confined to her room due to the alleged blood disorder she inherited from her mother. She is the film's primary protagonist, who dreams of existing in the world outside of her bedroom, which she considers her prison. While she initially strives to obey her father's rules about never going outside, later in the story, she becomes more and more assertive, attempting to earn her independence.
Emo Teen: Her song "Seventeen" highlights this heavily.
Ill Girl: She has a mysterious disease that confines her to her home. Subverted; her symptoms of illness come from her father poisoning her.
The Ingenue: She is heavily sheltered and unaware of what the world is like. Needless to say, her meetings with Graverobber are a bit of a shock to her.
Littlest Cancer Patient: Older than the typical example of that trope, and technically isn't suffering from cancer in fact, she's perfectly healthy but the imagery of the trope certainly is invoked in the scene we see her without her wig, in her sickbed, behind plastic drapes, wearing a hospital gown-esque nightie.
Missing Mom: Her mother, Marnie, died when Shiloh was born.
Morality Chain: It's implied Shiloh is all that's stopping Nathan from taking on the sociopathic Repo Man persona full-time.
Indeed, upon deciding that he failed Shilo, caused her to abandon him and drove her into Rotti's thrall, he declares...well, this:
Then let the father die
And let the monster RISE!
Naïve Newcomer: Her confinement means she has no idea how the world works.
"I'm the monster. I'm the villain. What perfection. What precision! Keen incisions, I deliver. Unscathed organs, I deliver. Repossession, I deliver. I'm the Repo! Legal Assassin!"
Shilo's father and a widower, having lost his wife Marni, a death which he blames himself for. He doubles as the head Repo Man. He often laments his late night duties, but a seeming multiple personality tends to take him over, leaving him a vicious killing machine as opposed to the kind hearted, torn father.
Ax-Crazy: As the Repo Man, Nathan appears to forget that the people he's vivisecting are human.
Consummate Liar: Lies about Shilo's condition her whole life, as well as his work
Deadly Doctor: He repossesses organs that people haven't paid for. He cares about the organs, so will use clean gloves and relevant scalpels. No anesthesia, transfusions, or replacements, though—good luck surviving without a spine.
The Dreaded: The entire introduction goes over how everyone lives in fear of (knowingly or not) missing a payment and being hunted down by the Repo Man.
Evil Sounds Deep: Particularly interesting in that his voice gets much deeper and more gravelly when he's in Repo Man mode. In "Night's Surgeon", he switches rapidly between the two personalities, and you can hear it in his voice.
Villain Song: He has several, including "Let the Monster Rise" and "Legal Assassin"
Woobie Destroyer of Worlds: He takes the Repo Man job so that he can keep himself and his daughter fed and clothed, and he appears to be genuinely mentally ill, given his shrine to Marni and how possessive he is of Shilo. He also kills a lot of people as the Repo Man
Played By: Sarah Power & Nancy Long
Nathan's deceased wife and Shilo's mother; she was Rotti's girlfriend but then left him for Nathan; jealous, Rotti poisoned her and framed Nathan for the crime.
Manipulative Bitch: We never get a lot of details about Marni's backstory, but just based on what we do get, she can come off this way. After all, she sweet-talks Rotti into helping her friend and then dumps him for Nathan pretty soon after...
Still, considering Rotti had either killed or ordered the deaths of each of the mothers of his three children, can you blame Marni for wanting to get out while she still had a chance?
Posthumous Character: The only time we see Marni is in flashbacks, where we find out she interacted with most members of the main cast.
Rottismo ‘Rotti’ Largo
Played By: Paul Sorvino
"Flesh is weak. Blood is cheap. Inconsistent…consistently. Use your sense. Save your cents. The only thing with persistence is gold!"
The ailing Gene Co president, looking for a worthy heir. He sees his own children, Luigi, Pavi, and Amber (formerly Carmela/Heather), as "vultures" and "ingrates", and is bitter towards Nathan for stealing Marni from him. He is the one who poisoned Marni, in rage.
Affably Evil: He very politely invites Shilo into his limo, and to nice parties; he even offers her a job! But no one is allowed to say no.
The Casanova: In his younger days; all three of his children have different mothers.
Corrupt Corporate Executive: Has his customers killed if they can't pay—and it's totally legal; he's made certain of it. And most of the plot of the movie is him trying to lure Shilo into being his protege, as a fuck-you to his kids and to Nathan.
Evil Laugh: The song "Rotti's Story" includes one.
Names to Run Away From Really Fast: Given the musical motifs, chances are good that we're meant to take "largo" by its musical definition. Meaning his name means, roughly, "slow rot". You know. Like the organ failure epidemic. The one he's profiting off of and encouraging.
The Resenter: His bitterness about losing Marni sets everything in motion.
Serial Dater: Word of God says he was this, which explains why all three of his children have different mothers. But instead of divorcing them...
Shoot the Messenger: When a doctor tells him there's nothing they can do to cure his illness, he has the doctor shot.
Villain with Good Publicity: The PR campaign praising the company and it's organ repossession policy is seem repeatedly during the film
Wicked Cultured: Say what you will about his morals—he sponsors a rather fantastic opera.
Played By: Bill Moseley
"Luigi don't take shit from no one!"
Rotti's eldest son and Pavi and Amber's homicidal, older brother. He usually wears an ascot, wields a knife at all times, and is always willing to stab someone for something as little as getting his shirt messy or getting him poorly-made coffee.
Good Scars, Evil Scars: Luigi has a variety of scars all over his body, gotten in surgeries to give him the best organs—making this an interesting case of scars the audience probably sees as Evil Scars, but in-universe are quite possibly Good Scars
Hair-Trigger Temper: Don't bring him bad coffee. Or trip near him. Or catch his attention when he's worked up. Or...y'know, it's really not that surprising that the Genterns tend to hang around Pavi more than Luigi.
Hot-Blooded: He shouts, he threatens, he stabs. Over coffee.
Rotti's youngest son and middle child. Womanizing, narcissistic, vacuous, and effeminate, he wears the skinned face of a woman as a mask over his own, which is heavily scarred. Due to the way his face is attached, he is able to change faces on a whim. He has an Italian accent (to conceal his speech impediment, according to Zdunich) and is almost always surrounded by women, usually Genterns, the employees of Gene Co, who usually give Pavi his face surgeries.
The Brainless Beauty: In a family that's obsessed with looking good even by their culture's standards, Pavi stands out as vain. He also looks like the only one who doesn't even consider what happens after Rotti dies.
Beware The Slightly Less Evil Ones: Looks over the murder with an almost satisfied expression during Night Surgeon, when even Luigi looks a little shocked. Also, when he's taunting the victim, his voice gets scratchier and deeper as he gets more violent.
Acts so creepy when he first meets Shilo, that Luigi actually steers her away from him.
Black Comedy Rape: Word of God tells us that Pavi is a rapist, so chances are quite a few of those ridiculously over-the-top scenes where Gentern fawn over/have sex with him are probably this.
Even Evil Has Standards: Sounds more comforting than taunting when he tells Nathan he can reunite Mag and Marni by killing the former; then him, Luigi and Amber all look at Rotti with what appears to be disapproval when he reminds Nathan of Marni's death.
Handsome Lech: By Repo standards, he's this—surgery is considered attractive, so his...face...makes him look good, and he flirts with just about everyone.
Informed Flaw: Pavi's status as a rapist. A particularly odd case, in that (a) it's not even informed from the film itself, but rather from the promotional materials, and (b) it's not like there was a shortage of evidence that Pavi is a freak beforehand.
Kavorka Man: Claims to leave the Gentern's "panties dripping."
"So you think Mag has pipes? Well it's my time to shine! When the Repo-Man strikes!"
Rotti's only daughter. Luigi and Pavi's younger sister, she is addicted to both surgery and Zydrate, which she obtains illegally from Grave Robber, in exchange for sex. She changed her last name from Largo to Sweet, as she "needed a stage name".
Hidden Depths: Amber may be a self destructive Rich Bitch, but she is one of the only children who seems to notice her dad is growing ill and seem genuinely concerned for him. And it appears she might just be a capable ruler of Geneco after all.
Shilo's godmother and Marni's best friend. She was born blind, but was given the ability to see by Gene Co at the price of having to sing for and publicize Gene Co permanently. She is marked for repossession and is set to deliver her final performance for the company.
Better to Die than Be Killed: Defies Rotti repeatedly, including ripping out her own eyes rather than wait for the Repo Man, knowing it can not end well for her.
Driven to Suicide: Blind Mag chooses to leave Gene Co, knowing this will mean her death; at the end, she snaps and tears out her own eyes on stage, forcing Rotti to kill her, rather than waiting to be hunted down like a dog by the Repo Men.
Eye Scream: Tears out her eyes herself, rather than wait for a Repo Man to come for her
Face Death with Dignity: Instigates her death in front of a live audience, rather than wait for it to come for her.
Only Sane Woman: Probably the only character in the cast without any major dysfunction. You heard that correctly; the woman who rips out her eyes with her finger nails is the sanest character in this film.
"It's quick, it's clean, and it's pure. It could change your life, rest assured. It's the 21st Century Cure! And it's my job, to steal and rob... GRAVES!"
A Zydrate peddler who obtains the insoluble chemical from corpses and has connections to Amber, both sexually and as a dealer. He also seems to be Shilo's first and only friend, and explains Zydrate and Mag's debt with Gene Co to her. Mysterious and charismatic, he acts as the narrator of the post-apocalyptic world.
Badass: Casually evades a heavily armed police force while screaming at the top of his lungs to draw their attention, seemingly just for kicks. Why he's stuck peddling drugs when he's so awesome is anyone's guess.
Word of God is that he got the cops' attention because he thought Shilo was cute, and wanted to impress her.