Personality:Dio is ambitious, narcissistic, arrogant and megalomaniac, and will do anything to get what he wants. He frequently bullied and upstaged Jonathan Joestar in their youth in order to place himself in a better position to replace him and obtain the Joestar family fortune, and in his adulthood, relinquished his humanity in favor of becoming a vampire. His personality could be explained by his poor childhood and the abusive relationship he shared with his father Dario Brando. Speedwagon, however, denied it as a cause for Dio's personality, claiming that Dio was already born this way and poverty had nothing to do with it.
However, Dio is not entirely evil, although he tends to approach it. He shows a good side to those who are good to him. In particular, he has shown favorable attitudes towards Enrico Pucci, who also showed loyalty in return. This trait is particularly emphasized in the anime, when Dio is shown to have killed his own father out of revenge for the abuse against his mother, rather than as a step in his scheme to rise in society. Dio also has a passion for reading, as he is found in the library of his Egypt mansion several times he is shown.
Unless provoked or deemed an obstacle, Dio will normally not attack anything or anybody (although probably more out of regarding them as inconsequential, and so not worthy of attention, than anything akin to kindness). He will first try persuading people to work for him, then fight them, if they oppose.
It is implied in Part VI: Stone Ocean that Dio wanted to use his stand to create a perfect world for himself and a handful of subordinates. He enlisted Pucci as his living "conscience", in case he would go crazy and veer "off track".
Araki personally considers Dio to be technically bisexual. He remarked that Dio can and will openly offer himself to either gender using any method, as long as the person suits his present desires. Since he is selfishly interested in their capabilities, however, Araki commented that Dio is the type who is incapable of loving another person wholeheartedly
History:Dio was born the son of Dario Brando, an alcoholic and abusive father who he secretly despised - in part for having caused pain to his mother. On Dario's deathbed, he told Dio of his encounter with George Joestar twelve years prior, instructing Dio go to the Joestar house and use his wiles to become wealthy. He was then adopted into the Joestar household and subsequently began undermining his new adoptive brother Jonathan at every opportunity. Dio was resolute to shatter Jonathan's spirit and take his place as the favored son, even going so far as to arrange for Jonathan's dog, Danny, to be burned to death.
Prior to become a vampire, Dio was already a quite able bare-handed fighter and a good amateur sportsman. Despite coming from a poor family, he has spent a lot of time reading and playing chess with adults. Thanks to it, he has grown as a cunning, charming and intelligent individual. He also was known as a really charismatic man and charmed many women through his life.
As a vampire, Dio possesses immense strength. He is also able to walk on walls and regenerate his body faster than fire can consume it. Almost unstoppable, only a bullet to the head fired at point-blank range is able to momentarily stun him. He is able to pressurize liquid in his eyeballs and then create small openings in his pupils, eventually creating two fluid jets (referred to by Straizo as Space Ripper Stingy Eyes) powerful enough to slice stone and kill living things. He is also able to vaporize his bodily fluids rapidly enough to freeze anything he touches.
His seemingly supernatural abilities are explained as him exercising the full potential of the human body. All of this, however, is at the expense of having a body sustained by sheer willpower alone, rather than vital energy. A sufficiently powerful vital force - specifically, sunlight or the Hamon force - will negate the sustaining force's presence and disintegrate the long-unliving body. Like all Jojo vampires, Dio sucks blood through tentacles in his fingers and has been seen at least once drinking blood from an unnamed girl.
In part 1, Dio's powers are more bio-organic and slimy, but for the most part in part 3 he only utilizes the "evil implants" - a parasite that brainwashes Polnareff and Kakyoin and is generated from Dio's hair (In the fighting game JoJo's Bizarre Adventure it is the vector of attack when he uses the move "Charisma").
Stand Name:The World
Stand Abilities:The World is similar to Jotaro's Star Platinum with its phenomenal strength, senses and stamina, but has a bigger range of use and is less durable to compensate. Its main form of attacking is to perform a sequence of punches while yelling Dio's battle cry "Muda Muda Muda!"
Time Stop: The World's defining power is its ability to stop time, allowing only itself and Dio to act within the duration of stopped time. Given Dio's weakened state during Part III, this ability only works for a few seconds in Dio's frame of reference before time flows again. However, also due to Dio's immortality, the duration of stopped time also increases as Dio becomes more accustomed to The World, reaching a maximum of nine seconds. The only way to counter this skill is with other time-manipulating skills.
Destructive Power A
Developmental Potential B