Yoshikage Kira (吉良 吉影 Kira Yoshikage) is the main antagonist of Diamond is Unbreakable.
Kira is a paraphilic serial killer who has been lurking unnoticed in Morioh for years. Having lived undisturbed all his life, Kira's routine is shaken when the ghost of his first victim Reimi Sugimoto begs the Joestar Group to look for him and he attracts unwanted attention by murdering Shigekiyo Yangu. Kira is a Stand User and wields Killer Queen to create deadly bombs.
Kira is also the protagonist of the short story Dead Man's Questions.