Yoshikage Kira

''You can call me Yoshikage Kira. I'm currently 33 years old. Not that you'd care, but I reside in northeast Morioh's villa district. Also, I've yet to marry. In order to make a living, I work for Kame Yu department stores. After a long day's work, I return home no later than 8 PM. I don't like smoking, but do enjoy the occasional drink. I'm always in bed by 11 PM, and I make it a point to get no less than 8 hours of sleep each night. Before bed, I drink a warm glass of milk, it's always coupled with 20 minutes of stretching to decompress from the long work day. Sweet dreams are the usual result of this. I then awake as refreshed and recharged as a newborn child, ready to take on the day's challenges, and after my last checkup I was given a clean bill of health. For as long as I can remember I've done everything in my power to live a productive life that allows me to pursue a lasting inner peace. This may be a foreign concept, but I choose not to concern my self with winning or losing, life's troubles, or enemies who bring sleepless nights. That is how I cope with this backwards life we find ourselves living. It's what brings me happiness in a world fraught with hardship and misery. Of course, if I were ever to engage in combat, I would win the battle without question.''

- Yoshikage Kira's famous monologue

Yoshikage Kira (吉良 吉影 Kira Yoshikage) is the main antagonist of Diamond Is Unbreakable.

Unnoticed in Morioh for years and undisturbed all his life, Yoshikage Kira is an abnormal and paraphilic serial killer whose 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 killing Shigekiyo Yangu. Kira is a Stand user and wields the powerful Killer Queen to create deadly bombs.

Kira is also the protagonist of the short story Dead Man's Questions.