Ryuki acts like something of an honor-student. He is largely defined by his dedication and eagerness to prove himself to his superiors, particularly Boss and Date, and ties his self-worth on their approval, He is especially close to Date and the two share a close "physical" and emotional relationship according to Date, with Date acting as a major source of moral support for Ryuki. His strong sense of justice stems from a strong hatred of criminals, and is shown to be extremely determined.