Complete Monster/JoJo's Bizarre Adventure

File:Dio Brando.jpg
Among the enemies that Jonathan Joestar and his compadres have gone up against, none were as utterly despicable as these ones.

* Dio Brando, particularly in *Part 3: Stardust Crusaders*. He has no compunctions forcing people to do his bidding, and even if they do that, it's no guarantee of survival (just look at what happened to poor Senator Phillips). His shadow also looms large over all antagonists that follow him, with all of them being connected to him in some way, and he's directly responsible for the events of *Part 6: Stone Ocean*, where one of Dio's minions ends up killing all of humanity with his stand. Oh, and he used his time-stopping stand to force someone to eat a dead cat and stab someone else in the face - and he did this just because he could.
	+ Dio also makes a habit of recruiting other monsters as minions: Jack the Ripper, Gray Fly, J. Geil, Steely Dan, Alessi, Terence D'Arby (what, you thought "Bizarre" was in the title just for show?)...
		- Need we mention his manifold heinous acts in *Part 1: Phantom Blood*? After being adopted by Jonathan Joestar's father, he proceeds to make Jonathan's life a living hell for no adequate reason. He beats up Jonathan, humiliates his girlfriend, burns his dog alive, tries to poison his father, and even renounces his humanity to become a nigh-immortal vampire. Things only get **worse** from here, with Dio embarking on a killing spree across London. Arguably, his single worst act in *Part 1* is cornering a young woman, who begs Dio to spare her baby. Dio agrees, promising not to kill the baby, then kills the woman and revives her as a zombie. True to his word, he leaves the baby... but instead watches as the zombified woman proceeds to *eat her own child* in front of him. The bastard refuses to die after being defeated, with his severed head returning at the very end to attack the cruise ship Jonathan and his new wife are on and sink it, leaving few survivors. Jonathan drags him to the bottom of the sea with him, finally killing Dio... until he returns 100 years later, using Jonathan's corpse as a body for his severed head. Even though Dio had a hideously abusive father, his Freudian Excuse isn't nearly good enough to excuse his barbaric behaviour. To reiterate the above - he did this *just because he could*.
		- Heaven Ascension DIO is an alternate version of Dio Brando who succeeded in his plan to wipe out the Joestar lineage and become a Physical God. Having slaughtered his way through innocents and enemies alike to achieve godhood, DIO absorbed the souls of 36 people to power himself up, and altered reality to turn his universe into one that worshipped him as its one true god. Upon learning that there are an infinite number of realities across time and space, DIO begins plotting to conquer them all, starting with the main timeline. DIO corrupts the souls of all of the Joestars' friends and family members, forcing them to fight one another before DIO murders them all and steals their souls to power himself up even further. In the end, DIO casually dismisses the suicide of his "friend" Enrico Pucci, murders Jotaro's daughter Jolyne in front of him, and proclaims he will alter the very fabric of reality so that all of existence revolves around him.
* Cioccolata. **OH DEAR GOD, CIOCCOLATA.** For starters, his backstory involves him torturing old people to death while maintaining a guise of being a good samaritan. When he starts fighting the heroes, he makes sure that he starts horribly killing the innocent people in the village just for fun. His stand, Green Day, works when people are at a lower altitude than him, so what does he do? He gets on a helicopter and flies above Rome to kill as many people as possible. It says something when even the Big Bad Diavolo, a man who would kill his own daughter to protect his identity, is disgusted by him. Thankfully, Giorno proceeds to give Cioccolata the biggest and longest beatdown in the entire series, and sends his corpse flying into a garbage truck for "combustible trash".
* J. Geil stands out as one of the vilest, and most sadistic, of the minor villains encountered by Jotaro Kujo and the Stardust Crusaders. Driven by a lust for teenage girls, he raped and killed the young Sherry Polnareff (and attempted to murder her friend as well, succeeding in the OVA), prompting her brother Jean Pierre to join the heroes and seek revenge. He boasts that she was just one of countless girls that he raped and killed. When confronted by Polnareff and Kakyoin, he shows himself to be a coward of the highest order, placing his stand in the eye of a little boy and telling his opponents that they'll never reach him without gouging out the boy's eye. When this fails, he escapes and inflicts grievous wounds on a man to disguise himself as a decoy for a sneak attack. Finally, he attracts a crowd of at least ten people, then hides his stand among them before trying to goad Polnareff into mowing them down by gloating about what he did to his sister. He dies showing nothing but pride in his actions.
* Terence T. D'Arby is the courteous and formal butler of Dio Brando. After introducing himself to the heroes and trapping them in his basement, he reveals his true colors, proudly displaying his collection of 15 "dolls", all people who he defeated in a game before taking their souls. Unlike his older brother Daniel J. D'Arby, he deliberately keeps them fully aware of their situation and powerless. He then defeats Kakyoin and adds him to the collection, intending to do the same to Jotaro and Joseph. He also gloats about an incident where he beat Daniel to near-death after catching him flirting with his girlfriend.
* Anjuro "Angelo" Katagiri is a Serial Killer and Japan's most notorious criminal. A robber and rapist since the age of 12, his infamy reached its peak after an incident in which he raped and killed two teenage boys before taking a third one hostage. He arranged a ransom with the boy's rich parents, but revealed at the exchange that he had cut off the boy's penis and killed him, and then killed one of the policemen who came for him. After escaping prison, Angelo bodyjacked a man, took a woman hostage at knifepoint and tried to stab her to death in a fit of pique. After Josuke thwarts him, he goes on a killing spree with seven civilian deaths. He attempts to kill Josuke and his mother out of spite, and then kills Josuke's grandfather. He returns for another attempt on their lives, and when defeated, he taunts Josuke with his grandfather's death and the fact that he can't kill Angelo without becoming like him, before trying to use his stand to strangle a young boy to death.
* Diavolo, the Big Bad of *Part 5: Golden Wind*, is the mysterious "boss" of Passione, who was ruthless enough to be able to edge out all the other Mafia families. However, he causes his more conscientious employees to rebel by rejecting the ethics adhered to by other mafiosi and selling hard drugs to minors. Driven by extreme paranoia, he resolves to erase all traces of his past identity and kill anyone who has seen his face. Years ago he attempted to kill his mother by sewing her mouth shut (a torment he later inflicts on a young boy) and burying her alive. He then burned his village to the ground, intending to kill everyone and being listed as a casualty; at least seven people are killed by this, and Diavolo intended to kill more. He rules his organization with an iron fist and makes a gruesome example of two of his elite assassins when they breach his privacy. He dismembers one of the men alive - which causes the other to commit suicide to avoid a similar fate - and then sends the bodies to their comrades as a macabre warning. When he learns that he has a teenage daughter, he responds by plotting to murder her, almost doing it himself before Bruno intervenes. Additionally, it was Diavolo who sold the Stand Arrows to Enya Geil, making him responsible for the outbreak of super-empowered villains that has driven the events of the series from *Part 3* onward. Heartless, paranoid and grandiose, Diavolo believed himself to be a rightful emperor over the whole world and stopped at nothing in pursuit of power.