Shindou is a polite, soft-spoken intellectual, often addressing his subordinates by their given names. Even though he is a yakuza head he is not above menial jobs. He rarely shows any sign of alarm or distress, and often has entire situations planned out well in advance. Although he has shown himself to be rather cynical on occasion, he is also a pragmatic and professional businessman. Whenever confronted, Shindou is casual and uncaring, attempting to draw out a conversation and make small talk, which often infuriates those he is talking to.
Shindou initially appeared to be a very kind, well-respected leader. However, this was just a mask to disguise his manipulative, and very dangerous, nature. In truth, he cares very little for his underlings, and is willing to use almost everyone around him as pawns to achieve his goals. He is willing to stop at nothing to further his selfish ambitions, including manipulating or killing anyone if he deems it to be necessary. He frequently toys with his underlings for amusement.
Shindou's true objective was to evolve and become a being that surpasses humanity
After hearing about an eminent virus researcher hired to develop a cure for Quantum Vapor he offered to pay for it. He later sent a few of his subordinate to steal it. During the struggle the Quantum Vapor sample was the destroyed and the scientist was killed. The subordinates were able to get the mutated strand however.