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
It is not known how Yoshihiro died, but when he did, his stand, Atom Heart Father, awakened. 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 same alleyway that Reimi Sugimoto resided in and had accidentally turned back, as his son mentions Yoshihiro warning him of such after he had died himself.

Diamond is Unbreakable
Josuke, Okuyasu, and Rohan 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. 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 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 two stand users to die and be kept alive by his stand post mortem, the other being Sports Max by Limp Bizkit.