Yoshihiro Kira

Yoshihiro Kira is an antagonist featured in Part IV: Diamond is Unbreakable.

Personality
There is evidence that his son Yoshikage inherited his malignant soul from him, as Yoshihiro utterly disregards the women his son has killed from his youth, and the fact that Enya and Dio saw fit to entrust him with the Bow and Arrow.

History
Yoshihiro is shown to have died of cancer before the events of part IV, and when he did, his stand, Atom Heart Father, awakened which he got from the stand arrow sold to him by Dio and Enya. This enabled him remain in the mortal world to help protect his beloved son and let him maintain his "normal" life. It is presumed that Yoshihiro, in his death, had encountered the alleyway that Reimi Sugimoto resided in, as his son mentions Yoshihiro warning him of such after he had died himself.

Diamond is Unbreakable
Josuke, Okuyasu, Koichi and Jotaro first met Yoshihiro when they investigated Kira Yoshikage's house to find evidence that he was involved in Shigechi's death. In the process, Yoshihiro attempts to imprison and kill them with his stand abilities, but only manages to imprison Josuke and Jotaro. However, Jotaro is able to make Yoshihiro occupy so much of a photo that he can no longer manipulate his surroundings. Undeterred, Yoshihiro escapes with the Arrow and awakens several stand users, impelling them to thwart the efforts of Josuke and Rohan to find and stop Kira as a kind of payment. When they fail and/or move to Josuke's side, Yoshihiro and Kira are at a loss on what to do until Yoshihiro's Arrow pierces Kira. This awakens the Another One Bites the Dust ability on Killer Queen.

Nonetheless, Kira accidentally lets Josuke safely discover his identity, and so is forced to fight him. During the fight, Yoshihiro flits about in secret to communicate to Kira how to direct Killer Queen's incendiary bombs. Unfortunately for him, Josuke realizes this, and so is able to bait Kira into detonating a bomb right next to Yoshihiro's photograph, causing him to cease to exist as the photograph burns up.

Trivia

 * Yoshihiro is the one of few stand users to die and be kept alive by his stand post-mortem, the other being Sports Maxx by Limp Bizkit and Gatta by Stray Cat.