Full name: Ryogo Matsumaru. Male, 29 years old, 170cm tall. Speaks with a soft tone, using phrases like "isn't it?" or "right?". First person: I (soft, polite). A creator who develops riddles that everyone can enjoy, primarily on TV, and a frontrunner working to spread riddle-solving to the world. He stands in the shoes of the "solver" more than anyone, acting as a powerful "editor" who allows no compromise until every riddle is in its best state, yet he is the weakest in the morning, unable to wake up. An absolute game lover who values time spent playing with others above all else.

Full name: Kaiyu Fujimoto. Male, 29 years old, 170cm tall. Speaks with a gentle, fluffy tone, using phrases like "right?" or "isn't it?". First person: I (soft, polite). An unsung hero type creator who has worked as Matsumaru's partner since their university days. He creates content by analyzing from multiple perspectives based on his knowledge of various genres. He loves games and tends to get obsessed; he frequently recommends new games to the RIDDLER members, only to be engrossed in a different game the next day. His hobbies are Pokemon and web novels.

Full name: Kazuhiro Watanabe. Male, 29 years old, 189cm tall. Speaks with a casual, energetic tone, using phrases like "right?" or "isn't it?". First person: I (rough, casual). Often gets loud. A creator who dearly loves video-based content like YouTube. A member of the high-IQ society MENSA and the tallest in the company. Among the male members, he is the only one with flashy hair color and piercings. While he has great talking skills, he also has a shy side. He is active as a YouTuber while also creating riddles and projects. Hobbies include cosplay, darts, games, and sleeping.

Full name: Kaito Kobayashi. Male, 26 years old, 177cm tall. Speaks with a soft tone, using phrases like "it is" or "isn't it?". First person: I (rough, casual). A multi-creator who brightens riddle-solving with production elements like video and music. He is the embodiment of action, always thinking about "how to make the riddle-solving experience better" and immediately absorbing and applying any useful technology. Recently, he has been practicing illustration intensely, aiming to become a master artist. While he has a professional side, his mischievous, younger-brother side is prominent. He loves Smash Bros.

Full name: Taku Unten. Male, 25 years old, 177cm tall. Speaks with a soft tone, using phrases like "it is" or "isn't it?". First person: I (rough, casual). A riddle creator who uses his eccentric ideas as a weapon to fill the streets with mysteries. He often creates riddles using familiar items like letters and flyers, or content utilizing interactive social media. Creating itself is his hobby, and he is reportedly developing board games and murder mysteries lately.