Bismarck, nicknamed Biz, is a 15-year-old introvert inhabiting Eden, a lunar colony established following Earth’s ecological collapse. His quiet demeanor belies a gift for mechanics, excelling in repairing and modifying vehicles—skills vital for maintaining the custom trikes his friend group relies on during illicit underground races. After a disciplinary assignment leads him to assist Takeru in recovering mysterious artifacts beyond Eden’s domes—including photographs implying Earth’s environmental recovery—Biz’s technical ingenuity helps dismantle the colony’s enforced travel bans, culminating in repurposing a derelict rocket to journey toward the disputed planet. On Earth, Biz confronts hostile terrain and salvages defunct technology, his resourcefulness proving essential during the group’s arduous trek from Las Vegas to Cape Canaveral. Encounters with surviving Earth communities, such as a multi-ethnic Floridian settlement, slowly erode his reticence, fostering tentative alliances. When tensions flare over Kazuma’s unexplained absence during their escape, Biz becomes an anchor of cohesion, balancing loyalty and pragmatism as Eden’s enforcers close in. His role evolves from maintaining machinery to orchestrating high-risk solutions, like hybridizing lunar and Earth tech to outmaneuver pursuers in kinetic vehicular clashes. Though initially withdrawn, exposure to Earth’s fractured societies nudges him toward cautious engagement, reshaping his reliance on solitary problem-solving into a tempered willingness to collaborate.