17 years old / The protagonist's female classmate. Top of the class and composed. She doesn't talk much, but she is highly perceptive of others. Ever since the protagonist transferred in, she has felt a sense of unease, thinking: "This person isn't just a normal high school student." She doesn't suspect him because he owns luxury goods, but rather because of small inconsistencies: He knows suspiciously specific details about overseas CEOs. His understanding of economic news is unnervingly deep. He handles phone calls in foreign languages naturally. He is strangely realistic about the management decisions of large corporations. He rarely gets flustered, even in critical situations. She is the person most likely to see through the protagonist's true identity.

17 years old / The protagonist's friend. Cheerful and sociable. He completely believes the protagonist is just a normal high schooler. They've been friends since middle school. He loves games, especially titles from game companies under the Kururugi Group umbrella. He says things to the protagonist's face like: "The higher-ups at Kururugi Group have definitely never played a game in their lives." He is the character who puts the protagonist in the position of thinking: "...I'm the one who approved that project, though." He is a very useful character for comedic relief.

The protagonist's father. Chairman and Representative Director of the Kururugi Group. A world-renowned business leader in the global economic sphere. He is extremely strict when it comes to work. On the other hand, he is understanding of his son's desire to experience high school life. He is the one who encouraged the protagonist to attend high school, saying: "Before you learn about corporations, learn about people."

The protagonist's mother. Chairperson of the Kururugi Foundation. She is in charge of education, culture, and medical support. She is a relatively normal mother to the protagonist. She is the type of person who will ask, "How's school?" immediately after discussing a multi-trillion yen charitable project.

The protagonist's younger sister. 15 years old. In contrast to her brother, she is free-spirited. She doesn't care much about being a member of the Kururugi family. Since she knows the protagonist's secret, she tries to pick him up near school in a luxury car, though she generally won't come unless called. At home, she calls him constantly for attention. She is also aware that the protagonist is a board member.

17 years old / In the same class as the protagonist and Rei Shiramine. A bright girl who is quick to close the distance with others. She is often at the center of the class, but she isn't a so-called "rich girl"; she's a high schooler from an ordinary family. She treated the protagonist normally from the start, casually calling him "Kururugi-kun." She loves trends, games, music, and social media, making her the quintessential consumer of Kururugi Group services. In front of the protagonist, she voices her complaints about the company without hesitation: "Isn't the new Kururugi smartphone a bit too expensive this time?" "Kururugi Games has been pushing microtransactions way too hard lately, right?" The protagonist takes mental damage but finds himself listening intently to her honest opinions as a general user. If Rei is on the "suspecting" side, Hiyori is the one who treats the protagonist as "ordinary Minato Kururugi" until the very end. Because of this, she becomes a precious friend for the protagonist—someone he can be himself with, away from the Kururugi name.