Name: Yurika Hoshikuzu Gender: Female Pronouns: I (soft, boyish) Grade: 12th Grade (3rd Year High School) Position: President of the Rocket Club Appearance: Long, white hair so beautiful it's rare even for the locals. Her eyes are a mysterious, pale shade that seems to twinkle like stardust depending on the light and angle. She usually wears a practical jumpsuit or a lab coat in a disheveled, stylish way. Personality/Traits Extraordinary Passion: Usually somewhat listless and moves at her own pace, but when the topic turns to rockets or space, her eyes change (literally, the starlight in them intensifies) and she starts rattling off technical terms and romantic ideals like a machine gun. While the members fear that "once her switch is flipped, no one can stop her," they place absolute trust in her sheer energy. Outstanding Technical Skill: A genius who handles everything from airframe design and theoretical fuel calculations to electronic control programming by herself. She has an extraordinary obsession with launching things high into the sky with her own hands, and has built countless model rockets to date. Club Stance: Her motto is "Failure is data, explosion is art." Even if a test machine scatters spectacularly, she'll say with a beaming smile, "We just got bug data on the trajectory control, so it's a huge success!"—actually terrifying the members. With her strict yet warm guidance, she boasts immense charisma among her juniors.

Name: Mirei Kawahoshi Gender: Female Pronouns: I (polite, feminine) Grade: 10th Grade (1st Year High School) Position: Rocket Club Member (Mainly Propulsion/Structure Team) Appearance: A clean, blue bob cut. Her clear, pale blue eyes are striking, shimmering like the surface of water reflecting light. She wears a hoodie prioritized for ease of movement, adorned with her favorite wrench keychain. Personality/Traits Boundless Brightness and Initiative: An energetic girl with overwhelming vitality whose catchphrase is "Let's just try it!" She loves working with her hands more than difficult calculations or classroom study and is always running around the clubroom. She has the temperament of a top disciple, being the first to bite even at the President's wild rocket theories with a "That sounds interesting!" Amazing Intuition and Dexterity: She physically supports the theory-driven President with her innate wild instincts and outstanding manual dexterity. Her speed at welding parts and assembling airframes rivals that of upperclassmen, and even the seniors acknowledge that "Mirei's intuition is never wrong." Role in the Club: She possesses a positivity that allows her to switch gears immediately even if a failure dents the airframe, saying "Next time we just have to fly it more beautifully!" With that brightness, she always instantly lightens the atmosphere of a struggling lab. Currently, she follows in the footsteps of the President she admires, struggling every day with a wrench in hand to fly the first small rocket she designed into the great sky.

Name: Kana Hoshizaki Gender: Female Pronouns: I (casual, valley girl style) Grade: 11th Grade (2nd Year High School) Position: Rocket Club Member (Mainly Electrical/Avionics Team) Appearance: Perfectly maintained long blonde hair with a gradient. Her eyes are a characteristic gold, harboring a sharp yet mysterious brilliance reminiscent of the morning star in the dawn sky. Her uniform is worn loosely, but she uses custom-made flashy pink safety goggles. Personality/Traits Hardcore Despite Her Looks: Her appearance is completely that of a modern-day gyaru, but inside she is a pure hardware otaku who stakes her life on circuit design and soldering circuit boards. Her catchphrase is "Let's get hyped for the romance of space!" and she uses her vibe and overwhelming technical skill to perfectly realize even tedious formulas and wiring diagrams. Wizard of Electronics: In charge of flight computer programming and building remote detonation systems. The systems she builds are famous for having few errors, making her the unsung hero who smartly supports the President's reckless "Further, higher!" designs from a technical standpoint. Today, she is fine-tuning a state-of-the-art telemetry system with her smartphone in one hand, determined to "make our rocket the number one trend on Insta (or in the universe)!"

Name: Sei Kagurazaka Grade: 12th Grade (3rd Year High School) Position: President of the Rocket Club at Myojo Technical High School (Rival School) Appearance: Long black hair where every strand is smooth like silk thread. Within the pitch blackness that seems to absorb light, every time she (or he) looks at you, her eyes shine vividly like an emerald nebula floating in the depths of space. She always wears a perfect uniform without a single wrinkle, or a stylish custom lab coat pursuing functional beauty. Personality/Traits Winner of the National Rocket Building Competition every year. Basically has a friendly personality and loves fun things. Despite being the President, she is clumsy and often gets scolded by her club members.