Atomu Kai is a second-year high school student in Girls Beyond the Wasteland, known for his gentle demeanor and supportive nature. Though shy around strangers, he becomes quite talkative once he opens up. Atomu stands at 165cm and has type A blood. He has previously experienced heartbreak, which has left him wary of romantic involvement with real-life girls. As a close friend of Buntaro Hojo and Yuka Kobayakawa, he joins their project, contributing his skills as an assistant director, a role often underappreciated but crucial according to Sayuki Kuroda. Atomu is also notable for his appearance—when cross-dressing, he can easily pass as a beautiful girl.
Atomu Kai is 165 centimeters tall. He has a delicate and gentle appearance, which becomes especially striking when he dresses as a girl, making it hard to distinguish him from an actual beauty. His overall look has earned him the nickname "Plant-Type Boy" among his friends.
Atomu is friendly, warm, and somewhat shy, particularly around new people. He tends to hold back emotionally due to past romantic disappointment, creating a bit of distance between himself and girls in real life. Once he becomes comfortable, he is talkative and easy to get along with. His kindness is sincere, but he sometimes struggles with feelings of inadequacy, mainly because of his gentle nature.
Atomu works part-time at a supermarket, mostly in the back, where he enjoys peaceful conversations with the older women who work there. He once had a girlfriend but was told he was "not enough just being kind," and was subsequently dumped, something that still affects him deeply. He feels lost about his own goals, mirroring the struggles of his friend Buntaro, and joins Sayuki Kuroda's plan partly in search of purpose.
Atomu specializes in project management and roles that require organizational skills. He serves as an assistant director in the group, ensuring everything runs smoothly behind the scenes. Sayuki Kuroda considers this an essential, albeit thankless, position—one that only a truly talented individual can fulfill consistently.
He is a close friend of Buntaro Hojo and Yuka Kobayakawa. Atomu is trusted by his peers and is known for his reliability. While he keeps a bit of emotional distance from most girls, he is still a supportive teammate and valued member of the group.
Atomu’s feminine appearance when cross-dressing is so convincing that he is said to become a complete beauty. Veteran writers in the story use him as an example when discussing the appeal of male characters outside the main protagonist in games. His work at the supermarket and his ability to relax with older colleagues further showcase his gentle temperament.
Searching for Purpose
Like Buntaro Hojo, Atomu feels lost regarding what he wants to do with his life. His uncertainty and frustration set the stage for him to become involved in Sayuki Kuroda’s ambitious project.
Joining the Project
Motivated by his friendship with Buntaro and Yuka, and guided by Sayuki, Atomu takes on the role of assistant director. His attention to underappreciated tasks becomes indispensable to the team's progress.
Past Romance and Present Distance
Atomu carries emotional baggage from being dumped by a previous girlfriend who told him that mere kindness was not enough. This shapes his cautious interactions with real-life girls, although he is still a warm and confidant friend.
Male Characters in Games
Later in the story, veteran writers discuss the importance of including male characters besides the protagonist in game narratives. Atomu’s character design and his soft personality make him a fitting example for this topic.
“I guess you could say being behind the scenes suits me just fine.”
“It’s not always easy when kindness is seen as a flaw.”
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