Nagare Konoe is the father of Subaru Konoe and serves as the head butler of the wealthy Suzutsuki family, acting as the personal butler to Kanade Suzutsuki's father. He is a middle‑aged man with medium‑length brown hair and blue eyes, and he is usually seen wearing a formal suit and glasses that give him an air of professionalism and authority. His background is rooted in a long tradition of service: the Konoe family has served the Suzutsukis for generations, and Nagare takes this duty very seriously. He is an exceptionally skilled butler, possessing not only thorough knowledge of household management but also considerable physical ability. He is shown to be in excellent fighting condition, easily withstanding a punch from Kinjirou Sakamachi without flinching, although his combat skills are still inferior to those of his daughter Subaru.

Nagare's personality is stern, dignified, and highly disciplined. He values order, loyalty, and the proper execution of one's duties. He is fiercely protective of his daughter and of the Suzutsuki family's reputation. This protective streak, however, manifests as a deep and persistent hostility toward Kinjirou. The animosity stems partly from Subaru having to explain that Kinjirou accidentally groped her when he discovered her secret, which makes Nagare deeply suspicious of Kinjirou's intentions. He seizes an opportunity during a trip to a pool to confront Kinjirou by staging a mock kidnapping, using the chance to physically beat him up. This incident, rather than resolving his anger, only widens the rift between him and Subaru, as his actions cause estrangement between father and daughter. His loathing of Kinjirou subsequently intensifies because he blames the young man for the growing distance in his relationship with Subaru.

Nagare's motivations are rooted in tradition and a desire to protect his daughter in the way he thinks best, which includes maintaining the butler legacy and ensuring Subaru keeps her true gender hidden. He believes that Kinjirou's presence threatens both Subaru's secret and her future as a butler. His role in the story is primarily that of an antagonistic force who creates obstacles for the main characters, especially Kinjirou. He acts as a stern father figure whose strict expectations and disapproval drive much of the tension in Subaru's personal life.

Despite his harsh exterior and confrontational behavior, Nagare genuinely cares for Subaru. His development is subtle: while he does not undergo a dramatic change of heart, the growing strain with his daughter hints at an underlying emotional conflict between his sense of duty and his love for her. He remains a capable and loyal butler throughout, and his notable abilities include exceptional martial arts skills, a sharp analytical mind, and the authoritative presence required to command the Suzutsuki household staff.