Satomi Kurokawa, the protagonist’s childhood friend, balances a part-time coffee shop job with a warm, approachable personality tinged with occasional naivety. Her grey hair, 163 cm frame, and 80-58-85 cm measurements complement a tomboyish demeanor that contrasts her waitstaff role. Though bonded by years of mutual support, recent strains reveal emotional distance and unexplained depression, marked by withdrawn behavior and guarded silence about her struggles. A turning point unfolds when she vanishes from work, leading the protagonist to discover her alone in the rain. She initially deflects his concern but later apologizes, quietly pleading for his help to “make her forget” an undisclosed pain, exposing her reliance on their connection during crises. Consistent across media, her arc intertwines with the protagonist’s social circle, anchoring their dynamic in shared history while hinting at unresolved turmoil beneath her cheerful exterior.