Alpha Hatsuseno is an A7M2 model android, one of the earliest production prototypes in the A7 series, which gives her the name Alpha. She operates Café Alpha, a small coffee shop in a rural coastal area, entrusted to her by her human owner before he departed on an indefinite journey. Her physical appearance includes fair skin, violet eyes, and mid-length green hair usually styled in a ponytail secured with a pink ribbon. Her typical outfit consists of an upturned collared white shirt fastened with a pink ribbon and circular red brooch, a dark blue waistcoat, high-waisted tapered trousers, and ballerina flats, though she changes clothes for seasons, activities, and events. Her teardrop-shaped red earrings remain a constant. She has a cheerful and curious personality blended with a reflective, observant nature. She possesses a pronounced sweet tooth and takes her coffee heavily sugared. Her robotic physiology imposes strict limits: animal protein causes severe internal discomfort, and even minimal alcohol affects her intensely. Key relationships include a familial bond with an elderly neighbor known as Uncle or Ojisan, a close friendship with Kokone Takatsu, another android who develops romantic feelings for Alpha, and a sibling-like dynamic with Takahiro, a human boy who frequents the café. Significant items include a camera gifted by her owner, which she uses to document her surroundings, and a gun from the same source, treated as an ornamental keepsake. Her character development centers on moving from passive waiting to active engagement. After a typhoon damages Café Alpha, she undertakes a journey around the country, deepening her understanding of the declining human world and her role as a witness to humanity’s twilight. Over time, she adapts to change while preserving her core identity, and in a distant future the café becomes a local legend.