Robert E. O. Speedwagon is a major ally featured in the 1st part of JoJo's Bizarre Adventure, Phantom Blood, and then the 2nd part, Battle Tendency. Formerly a Londoner thug residing in Ogre Street, Speedwagon befriends Jonathan Joestar and, despite remaining a powerless human, becomes a loyal ally to the Joestar Family during his whole life and beyond thanks to the company he's founded: the Speedwagon Foundation. His company supports the Joestars in Stardust Crusaders, Diamond is Unbreakable, and Stone Ocean.

(Source: JoJo Wikia)

Beginning its tale in 19th century England, young aristocrat Jonathan Joestar finds himself locked in bitter rivalry with Dio Brando, a low-born boy who Jonathan's father took under his wing after the death of Dio's father. Discontent with his station in life, Dio's fathomless lust to reign over all eventually leads him to seek the supernatural powers of an ancient Aztec stone mask in the Joestar's possession—an artifact that will forever change the destiny of Dio and Jonathan for generations to come. 
 
Fifty years later, in 1938 New York City, Jonathan's grandson Joseph Joestar must take up his grandfather's mission and master the abilities necessary to destroy the stone mask and its immensely powerful creators who threaten humanity's very existence, the Pillar Men. 
(Source: Anime News Network)

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[Website](https://www.keithsilverstein.com/) | [Twitter](https://twitter.com/SilverTalkie) | [Instagram](https://www.instagram.com/keithsilverstein/) | [Facebook](https://www.facebook.com/keithsilversteinvo) | [TikTok](https://www.tiktok.com/@keithsilversteinva)

Keith David Silverstein is an American voice actor, best known for his roles as Johan Liebert in Monster, Vector the Crocodile in the Sonic the Hedgehog video games, Robert E.O. Speedwagon in JoJo's Bizarre Adventure, Hisoka in the 2011 version of Hunter × Hunter, Oogai Mori in Bungo Stray Dogs. He is also known from several non-anime roles, including Gabriel Agreste a.k.a. Hawk Moth (Shadow Moth in later seasons) in Miraculous: Tales of Ladybug & Cat Noir, and Zhongli in Genshin Impact.

[Twitter](https://twitter.com/SilvioGiraldi)

Silvio is a Brazilian actor, dubber and director.

[Twitter](https://twitter.com/elvicruiz)

Víctor Ruiz is a Mexican voice and theater actor, known for being the voice of Saitama in One Punch Man and Blinky Bill in The Wild Adventures of Blinky Bill.

''Adith Siddiq Permana'' is an Indonesian voice actor.

[Website](http://www.gianlucaiacono.it/) | [Youtube](https://www.youtube.com/user/SirYaken) | [Instagram](https://www.instagram.com/gianlucaiacono_official/) | [Twitter](https://twitter.com/iacono_gianluca) | [Facebook](https://www.facebook.com/gianluca.iacono1) | [Twitch](https://www.twitch.tv/gianlucaiacono_official) 

Gianluca Iacono is an Italian voice actor who contributes to voicing characters in movies, cartoons, anime and more content.
Iacono is well known for voicing Vegeta in the Italian version of Dragon Ball Z, Dragon Ball GT, Dragon Ball Super and Roy Mustang in Fullmetal Alchemist.
Between 2010 and 2011, he temporarily replaced Claudio Moneta as the voice of Kakashi Hatake in Naruto: Shippuden.
Iacono currently works at Deneb Film, Studio P.V., Merak Film, Studio ASCI and other dubbing studios in Italy. 

The beginning of the Battle Tendency Arc! The Joestar family is called upon to do battle against evil again! This time, it’s Joseph Joestar, the grandson of Jonathan Joestar! And his enemies are more powerful and diabolical than ever! Behold! The terror of the Pillar Men!
 
(Source: Viz Media)

Young Jonathan Joestar’s life is forever changed when he meets his new adopted brother, Dio. For some reason, Dio has a smoldering grudge against him and derives pleasure from seeing him suffer. But every man has his limits, as Dio finds out. This is the beginning of a long and hateful relationship!
 
(Source: Viz Media)

This entry is for the 2007 movie, not to be confused by the first arc of the 2012 TV anime adaptation of Jojo's Bizarre Adventure, also named Phantom Blood. Nor the movie format 're-edit' of said first season compiled from the 2012 TV episodes. 
Jonathan Joestar is an aristocratic boy whose life is suddenly turned upside down by a mysterious new boy who arrives, Dio Brando. Dio has a connection to his father, and over time, a rivalry forms as Dio becomes obsessed with a mysterious, ancient, and mystical stone mask that Jonathan's father keeps. 
Note: This film hasn't been released publicly outside of its original limited theatrical run and is considered mostly lost, apart from several trailers and a found 16-minute undubbed clip compilation used for a student sound design assignment. (Source: Lost Media Wiki)

Written and presented as the lost transcript of Dio's Diary, featured in Stone Ocean. In the book, he reflects upon his battles throughout the original series, describes his ideals and plans for "obtaining heaven" and talks about the concept of death, as well as his unfortunate mother.