Shigekiyo Yangu

Shigekiyo Yangu (more commonly known by nickname Shigechi) is a character from Part IV: Diamond is Unbreakable.

Personality
Shigechi initially comes off as naive, with little thought for the creative use of his powers. He is also to some extent socially inept, giving Josuke and Okuyasu a share of the spoils he acquired through Harvest in order to become their friend, and does not share the five million yen that he acquired through the lottery with Josuke and Okuyasu's help. However, Shigechi is not stupid, demonstrated by the crafty use of his stand to secretly gather alcohol and inject them into his opponents to intoxicate them.

Shigechi also demonstrates hotheadedness, however, when he attempts to assault Yoshikage Kira (without knowing his true identity as a serial killer) for stealing his sandwich.

Synopsis
Shigechi, a high school student, was first seen after Josuke followed some of his Harvest's stands during a coin collecting spree in fear of finding a potential enemy stand user. At first Josuke and Okuyasu believed him to be a complete idiot by his strange demonstration of generosity to share the wealth he had just accumulated by Harvest, though Josuke insisted on not taking advantage of his naivete, but instead work together with Shigechi and then equally share the spoils.

Soon Josuke and Okuyasu's plan backfired as Shigechi turned on them, insulted at being called an idiot and selfishly not understanding that they deserved the equal share of the money they had all worked for together. This started a wild goose chase after him at which point Shigechi revealed that Harvest's advantage relies heavily on his numerous stand parts. Using multiple attacks from Harvest's men combined with dirty tactics, such as having Harvest inject alcohol directly into the blood stream of Josuke and Okuyasu, Shigechi proved to be a tough opponent.

After being subdued, Shigechi finally admitted that Josuke and Okuyasu were indeed deserving of one third each of the money they had gotten together. They then became friends at school.

Later, due to an unfortunate coincidence, Shigechi discovers Yoshikage Kira's homicidal nature and in turn pays with his life for this knowledge before he was able to ask Josuke for help.