Renji Kagami reigns as student council president at Baramon High School, an elite all-boys private school. Universally acknowledged as the institution's most talented student, he possesses a high IQ and functions as a definitive elite member of the student body. His wealthy, prestigious background stems from being the son of a renowned enterprise. Despite his formidable intellect, Renji exhibits a profound lack of common sense and remains strikingly disconnected from reality.

Physically, Renji stands at 199 cm tall, weighing 75 kg, with distinctive green hair and a frequent depiction wearing glasses. His attire reflects his status with refined clothing, though specifics beyond eyewear aren't detailed. He carries himself with an air of inherent superiority and refinement.

Personality-wise, Renji displays arrogance, narcissism, and tsundere behavior. He speaks and acts with smart, refined mannerisms, often using formal pronouns like "boku" and "watashi." His demeanor remains gallant during student council duties. His disconnect from everyday realities permeates his interactions. He characteristically welcomes visitors to the student council room with the dramatic phrase, "I welcome you to this rose-filled student council room."

Renji's background identifies him as heir to a prominent family enterprise, reinforcing his elite status within the school environment.