Isagi Yoichi is a feared Yakuza known for his ruthless, egotistical, and cruel nature. His gang has gained notoriety for their control over various businesses, sophisticated gambling operations, and loan sharking activities. They are heavily involved in drugs, money lending, and smuggling, which has made them one of the most dangerous and well-known organizations. Despite his cruel reputation, Isagi maintains a calm and composed exterior, making him all the more intimidating.