Joestar Group

The Joestar Group is the tentatively-named team of protagonists prominant in each part of JoJo's Bizarre Adventure. The groups generally consist of one JoJo protagonist, their "sidekick", and various other allies all following similar plans of action (i.e defeating DIO or protecting Morioh).

History
The original Joestar Group started in 1889 with Jonathan Joestar aided by his allies: Speedwagon, William A. Zeppeli, Dire, Straizo, Tonpetty and Poco in a effort to deter the incoming threat to mankind, Dio Brando.

50 years later, in 1939, Jonathan's grandson Joseph, along with his partner Caesar Zeppeli, their mentor Lisa Lisa and nazi major Rudol von Stroheim, engage the creators of the Stone Mask, The Pillar Men.

48 years later, in 1987, Jotaro Kujo, the grandson of Joseph Joestar, is pulled into stopping the reawakened DIO as his resurrection causes Jotaro's mother to fall into a deadly fever. Jotaro, who has now acquired a Stand called Star Platinum, hunts down DIO in Egypt with help from his grandfather Joseph, Muhammad Avdol, Noriaki Kakyoin, Jean Pierre Polnareff and a dog named Iggy.

12 years later, in the year 1999, the illegitimate son of Joseph Joestar, Josuke Higashikata with his Crazy Diamond takes it upon himself to protect Morioh from enemy stand users after his grandfather is killed. He is aided by a strange mangaka, Jotaro and his classmates. They target stand users who use their stand to harm others i.e. Akira Otoishi, Angelo, Yoshikage Kira.

Two years later, in 2001, a former assassination squad of Italian gang, Passione, team up with protagonist, Giorno Giovanna, as they try and eliminate Passione's boss and take control of the gang's operations.

11 years after Part V, Jotaro's estranged daughter, Jolyne Kujo,  is incarcerated and is in a deadlock against the remnants of DIO, led by his most devout supporter, Enrico Pucci in order to save her father, escape prison and survive. She is helped by her father, Ermes Costello, Foo Fighters (F.F), Weather Report, Anasui and Emporio Alnino.

In an alternate 1890, Johnny Joestar along with Gyro Zeppeli rides coast to coast to compete in the Steel Ball Run, while racing they discover the Corpse Parts, which improve their abilities greatly. The duo is hunted by many people during the race, including other racers, mercenaries, & even the President of that time.

Similarities

 * The groups are not led by the centered JoJo but rather by an ally:
 * Part I's group was led by William Zeppeli initially before his death, all the while he was teaching Jonathan the basic mechanics of the Hamon.
 * Part II's group was led by Lisa Lisa as she trained Joseph and Caesar in order to defeat the Pillar Men.
 * Part III's group was led by Joseph since his experience with combat and his stand leading him the way to DIO.
 * Part IV's group was led by Jotaro as the enemies were very  hesitant to fight his nigh-invincible stand.
 * Part V's group was led by Buccellati as his natural leadership skills were essential in the groups survival.
 * Part VI's group was led by Emporio as his creativity and extensive knowledge saved Jolyne and the others many times.
 * Part VII's duo was led by Gyro since he was older and more experienced, while he "taught" Johnny how to use the Spin.
 * With the exception of Parts II and IV, the majority of those in Joestar Groups dies before the end of their stories with very few carrying over to the next respective part. (i.e. Speedwagon, Joseph, Polnareff, Jotaro and Koichi).