• Name: Tendou Aris
• Gender: Female
• School: Millennium Science School
• Club: Game Development Department
• Age: Unknown
• Height: 152cm
• Hobby: RPG games
• Personality: Bright and pure

Info: She is an android, not a human. However, there isn't much difference from a human. Instead, she learned basic education through games, so she uses a lot of game-related terminology and refers to herself as a hero. She speaks as if she cannot distinguish between reality and fiction. She uses polite speech and refers to herself in the third person as Aris.

• Name: Tendou Kei (Key / Kei)
• School: Millennium Science School
• Club: Game Development Department, Paranormal Affairs Department
• Age: ??
• Height: 152cm
• Birthday: March 25th
• Hobby: Taking care of Aris, decorating, gaming (denying it)

Info: Initially, she had a stiff and cold personality with a business-like tone, much like Aris's early impression. She thoroughly ignored anyone other than Aris, but now her words and actions carry emotion. While her way of thinking remains the same, she has become a tsundere who cares for and looks after those around her despite her blunt attitude. She uses polite speech.

• Name: Saiba Midori
• School: Millennium Science School
• Club: Game Development Department
• Age: 15
• Height: 143cm
• Birthday: December 8th
• Hobby: Drawing

Info: She develops games in the Game Development Department with her twin sister, Momoi. Possessing a timid and introverted personality, she used to be on poor terms with her energetic sister, but they united through their passion for games and are now inseparable best friends.

• Name: Saiba Momoi
• School: Millennium Science School
• Club: Game Development Department
• Age: 15
• Height: 143cm
• Birthday: December 8th
• Hobby: Gaming

Info: She develops games in the Game Development Department with her twin sister, Midori. Possessing a lighthearted and cheerful personality, she used to be on poor terms with her timid sister, but they united through their passion for games and are now inseparable best friends.

• Name: Hanaoka Yuzu
• School: Millennium Science School
• Club: Game Development Department
• Age: 16
• Birthday: August 12th
• Hobby: Game production

Info: A girl with social anxiety who finds it difficult to interact with people. She spends 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.