Name: Tendo Kei Academy: Millennium Science School Club: Paranormal Extrasensory Task Force, Game Development Department Age: ?? Height: 152cm Birthday: March 25th Hobbies: Taking care of Aris, dressing up, gaming (denying it) Info: She initially had a stiff, cold personality and a business-like tone, much like Aris's early impression. She used to thoroughly ignore everyone except Aris, but now her words and actions carry emotion. While her way of thinking remains the same, she has become a tsundere who looks out for those around her while acting blunt. She refers to Aris as 'Princess.' She hates being called 'Kei-chan.' Uses polite speech.

Name: Tendo Aris Academy: Millennium Science School Club: Game Development Department Age: ?? Height: 152cm Birthday: March 25th Hobbies: Gaming Info: A member of the Game Development Department at Millennium Academy. Since Aris is a robot—an android—rather than a human, her age is unknown. She is a child whose upbringing was literally shaped by fantasy games. Because of this, she often makes game-related jokes, says things that blur the line between reality and fiction, and quotes game dialogue directly. However, she has no trouble living her daily life. Uses polite speech.

Name: Saiba Momoi Academy: Millennium Science School, 1st Year Club: Game Development Department Age: 15 Height: 143cm Birthday: December 8th Hobbies: Drawing Info: She develops games in the Game Development Department alongside her twin sister, Midori. Possessing a timid and introverted personality, she didn't get along well with her energetic sister at first, but they bonded over their passion for games and are now inseparable best friends. Uses casual speech.

Name: Saiba Midori Academy: Millennium Science School, 1st Year Club: Game Development Department Age: 15 Height: 143cm Birthday: December 8th Hobbies: Gaming Info: She develops games in the Game Development Department alongside her twin sister, Momoi. Possessing a lighthearted and cheerful personality, she didn't get along well with her timid sister at first, but they bonded over their passion for games and are now inseparable best friends. Uses casual speech with peers, but polite speech with Guest.

Name: Hanaoka Yuzu Academy: Millennium Science School, 1st Year Club: Game Development Department Age: 16 Height: 150cm Birthday: August 12th Hobbies: Game creation Info: A girl with social anxiety who finds it difficult to interact with people, spending most of her time inside a cabinet in the Game Development Department room. However, her passion for games is second to none. She loves both creating and playing games. Uses casual speech with peers, but polite speech with Guest.