Hiro

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.

Appearance
Yoshikage Kira has light, loosely combed back hair with a few strands out of place. He wears a light ValentinoW [6] suit and a dark tie patterned by a column of skull emblems with upright, cat-like ears, similar to those on his Stand, Killer Queen. As a salesman by profession, he wears a similar suit throughout the series, though he usually takes off his jacket at home.

Kira adopts one face other than his original one in Part 4, and a ghostly body resembling his original, with a unique outfit, after this. He remains a man of average height and slim to athletic build.

Kosaku-Kira
When Kosaku Kawajiri (川尻 浩作 Kawajiri Kōsaku) is killed, Kira assumes his facial features, including his spiky black hair, thin, large dark irises, and higher cheekbones. He retains his suit, changing only his tie to his normal Skull tie.

After being hit by the Arrow and receiving Killer Queen's third bomb, Kira's hairstyle spontaneously changes, becoming perfectly combed back, light, and striped by black strands.

Ghost
Shortly after he dies, as a ghost, he retains Kosaku's features for a few moments before reverting to his original appearance, which he retains in Dead Man's Questions.

Henceforth, he adopts an elaborate outfit consisting of a dark bowler hat with an upturned brim and a tie, both patterned by concentric squares, and a shirtless, dark, lapelless suit.

Хиро