Rachel, a childhood companion of protagonist Shun, quietly harbors unreciprocated romantic feelings that elude his awareness. She appears during his rooftop mechanical repairs on the lunar colony, engaging with him yet displaying minimal curiosity toward his technical passions. Though consistently supportive within Shun’s orbit, her origins, aspirations, and life beyond their interactions remain undefined, with no mention of family, profession, or formative experiences. Her narrative purpose intertwines with Shun’s world and the lunar society’s subjugation under Earth’s regime. The original OVA and related media do not develop her character arc, prioritizing her role in relational dynamics over autonomous growth or plot impact. Without expanded stories exploring her perspective, her existence remains confined to moments alongside Shun, her choices and agency outside their connection unaddressed in documented lore.