Rinko Namino is a 14-year-old student in class 2-5 at Kamui Daimon Comprehensive Academy, serving as the LBX mechanic for Jenock's Second Platoon. Her dark brown hair is tied into two pigtails secured with white cords, and she has black or dark red eyes featuring distinctive pink dots. She wears the standard Jenock girls' uniform layered beneath her mechanics attire. Quiet and gentle by nature, Rinko channels intense passion into her mechanical work, proactively seeking LBX knowledge from peers like Sakuya Hosono. Originally arriving at the academy as an LBX player, her technical aptitude prompted a shift to mechanics. She first appears in episode 1 during Reina Mito’s introduction of Arata Sena and Hikaru Hoshihara, formally presenting herself and her platoon to them in episode 2’s dining room scene. Technical discussions drive her involvement, notably in episode 7 where she collaborates with mechanics and instructors to optimize hybrid LBX equipment. In episode 9, she joins late-night talks with Nozomi and Hanako about LBX Hill ghost rumors. The next morning, she witnesses Bunta Fujiwara secretly handing an envelope to a Rossius student; confronting him yields only dismissive evasion. Later, she meets Sakuya and the First Platoon on the roof, analyzing mechanics' budget limits and theorizing Bunta’s potential illicit activities spurred by financial strain. Episode 14 marks her reappearance during Reina’s introduction of new students Yuuji Nishimura and Takao Ooyama. A pivotal achievement unfolds in episode 23: Rinko and Sakuya construct the LBX Trivhine using Dot Blastrizer blueprints, later deployed by Haruki Izumo in combat using its Tri Cannon. Gameplay integration makes her recruitable after the "Angel Piece" capture mission. At recruitment, she operates at level 20 with an 8750 SC cost. Her technical specialties include Strider Frame armor production, and her LBX proficiencies are Knight: 10, Strider: 10, Brawler: 20, and Wild: 10. She pilots the LBX DC Aerial for mechanical support. Her dynamic with Sakuya extends beyond technical collaboration, highlighted in episode 10 when her silver-credits inquiry sparks a misinterpreted romantic rumor among observers—though no such relationship materializes.