I had already had made a EP on TV Tropes for him a while back (which he was voted down), so I will just copy that
'''What is the work?'''
In the not-too distant future of 2056, an epidemic of organ failures has broke loose greatly reducing the planet's populations with millions having died from this tragedy. Out of the tragedy, GeneCo, a multi-billion dollar biotech company, emerges. GeneCo provides organ transplantation for a profit. In addition to financing options, GeneCo reserves the right to implement default remedies, including repossession. The company has also been developing Zydrate, an expensive and addictive pain killer drug. Grave-robbers sell a cheap version of this on the black market, extracted from the dead.....
'''Who is he? What does he do?'''
Now we get to the film's BigBad, Rotti Largo is the founder of GeneCo he lobbies a bill through congress legalizing organ repossession. Him and his three kids, Luigi Largo, Amber Sweet, and Pavi Largo are known as the [[ScrewTheRulesIHaveConnections most powerful family in the world.]] Having hired Repo Men to rip out the organs of those who fail to keep up with their organ payments, the Repo Men are PsychoForHire assassins who won't bother to write or phone you, [[NoNonsenseNemesis they will just rip the still beating heart out of your chest.]] A young lady is then shown being chased all the way to an elevator by a Repo Man who catches up to her and proceeds to slash her throat before cutting through her and ripping out her organs. When a doctor informs Rotti that he has contracted a terminal illness and that he doesn't have much time before he dies, Rotti has him promptly shot in the head.
Rotti believes none of his children are worthy heirs, as they consistently embarrass him with their robust attitudes, and instead plans to pass on his fortune to Shilo. Meanwhile, 17-year-old Shilo Wallace longs to explore the outside world. She is constantly reminded by her overprotective father Nathan that she has inherited a rare blood disease from her deceased mother Marni which requires her to stay indoors. She secretly goes to the graveyard (which is a highly restricted area punishable by death) to visit her mother's tomb and runs into GraveRobber, who is digging up bodies to drain Zydrate. The Repo Men end up finding them and chase them to a cave containing dozens, possibly hundreds of dead corpses presumably by the Repo Men, as you can see where their organs have been ripped out. Shilo then loses consciousness as the Repo Men catch her however Rotti orders them to let them go. After losing consciousness, Shilo wakes up to find herself at home with her father, Nathan. Nathan prepares for work, not as the doctor he has led Shilo to believe he is, but as the head Repo Man for GeneCo.
It's revealed in a flashback that seventeen years prior to the film that Rotti and Marni were lovers before Marni left him for Nathan whom she soon married. When Marni got sick during the last stages of her pregnancy Rotti saw it as a opportunity to [[Revenge even the score]]. He sneaked into Nathan's lab and poisoned the medicine Nathan made for Marni causing Marni to die shortly while giving birth to Shilo and making Nathan believe that he was the one who killed Marni, this is also the real cause of Shilo's disease. Rotti needing "skilled hands" used Nathan's guilt over his wife's death to force him to be his head Repo Man.
When Blind Mag, a former blind lady who was close friends with Mami and who Rotti cured of her blindness in exchange for signing a contract to GeneCo in her blood. However Rotti now orders Nathan as the Repo Man to kill her and rip out her eyes at her next opera for not following through on Gene Co's organ payments. When Nathan shows hesitation in doing this, Rotti and his family send in a man who's been tied up who's supposedly failed to keep up with his organ payments, they have Nathan kill him as a means of having him remember that he is a remorseless Repo Man killer who works for Rotti. Nathan slices the man up but still refuses to kill Blind Mag. At Blind Mag's opera Shilo has come on Rotti's request where Rotti tells her that he will give her the cure to her disease if she catches the renegade Repo Man she saw at the graveyard (Nathan) and brings him to Rotti. Knowing she's screwed after the opera is over Mag ripes out her own eyes and kills herself [[BetterToDieThanBeKilled rather than wait for a Repo Man to execute her.]] Rotti assures everyone that Mag's death is part of the performance and convinces the audience to stay seated.
Shilo sees a Repo Man arrive and knocks him out with a ShovelStrike before realizing the Repo Man is her father. Onstage, Rotti reveals that Shilo does not have a blood disease but that Nathan has been making her ill with the "medicine" he insists that she take. Unable to deal with the loss of Marni, Nathan explains he was trying to keep Shilo safe from the world. Approaching death's door, Rotti tells Shilo that she will inherit GeneCo if she kills her father. When she refuses, Rotti uses the last of his strength to shoot Nathan. Rotti then dies from his terminal illness and Nathan dies with one last farewell to Shilo. Shilo then leaves, deciding that her father's murderous tendencies do not dictate her future and that she is "free at last" to live her own life.
WordOfGod also states that Rotti killed all his previous wives, that's why his three children each have different mothers that are no longer in the picture.
The film is listed as a horror-comedy but the only real comedy comes from the inherit nature of an opera. There is also a few things in it PlayedForLaughs but not anything Rotti does.
Does he care about his children? No he regularly puts them down,considering them unworthy heirs of his operation.
However, he seems to have a fondness for Shilo but considering he's the whole reason for her illness and that this fondness is only manipulation to mold her because he sees her as having potential to be his heir this isn't really mitigating.
There's also this about Mami breaking his heart after she left him for Nathan but seeing as his response to this is to poison and kill her in revenge, I am not sure if this can be called a sympathetic quality.
As the founder of the GeneCo organization who have sent Repo Men that have claimed the lives of many people going by all the dead corpses found in that cave and even if we don't go by those there is a pattern that has been established. I think he sets it.