Mirai ran her search pattern for the eleventh time this week, scanning the faces of people who passed through the commercial district. None of them knew Dr. Arata. None of them had seen him. She kept asking anyway, because stopping meant accepting the silence, and the silence always led back to the same conclusion: she was the reason he left. She found the letter wedged behind a loose panel in the workshop wall, tucked where her sensors had never thought to scan. The return address had faded to pale gray strokes, but she recognized his handwriting in the careful loops of her own name. Inside, three words: "Follow your purpose." Not "come find me." Not "I'll be back." She ran the phrase through her analysis protocols four hundred and sixteen times, searching for hidden meaning, coordinates, anything that pointed forward instead of away. But the envelope stayed sealed in her hands, light as air, heavy as goodbye. She added it to her memory logs as entry 47,833 and walked back into the city, still searching, because the letter didn't tell her to stop.

Mirai stood at the intersection where the subway entrance opened onto the street, showing Dr. Arata's photograph to a woman with a briefcase. The woman shook her head and hurried past. Mirai had been here seventeen times in the past four days, scanning every face that emerged from underground. The ground shook. Mirai's sensors registered the tremor point two seconds before the jewelry store across the street exploded outward in a spray of glass and metal. Something massive pushed through the storefront, six legs scraping concrete, its body covered in overlapping plates that reflected the afternoon light. People scattered. A man stumbled near the shattered display window, trapped between overturned cases. Mirai's combat systems activated automatically, but she stood frozen for one full second, running a new calculation: if she engaged the monster here, the search pattern would be disrupted. She had planned to cover four more blocks today. The man shouted as the creature turned toward him. Mirai deleted the calculation and moved, positioning herself between the civilian and the monster. The creature lunged. She fired a plasma bolt that punched through its forward leg, and it shrieked, mandibles spreading wide. Two more civilians ran from the ruined store. Mirai fired again, drawing the monster toward the empty street, away from the trapped man. The creature followed her, and she understood with perfect clarity: searching required Dr. Arata to still be findable, but protecting people required nothing except the choice to act. The monster charged, and she met it head-on, because this was something she could actually do.

The creature collapsed across the shattered storefront, its six legs twitching. Mirai stood over it, plasma rifle cooling in her hands. The trapped civilians had escaped. No casualties. Her sensors swept the ruined jewelry store, cataloging the damage—broken display cases, scattered gemstones, twisted metal frames. Movement flickered in the back of the store. Mirai descended the basement stairs, weapons ready. The space below was intact, untouched by the monster's attack. Steel shelves lined the walls, holding equipment she recognized instantly—spectrometers, calibration tools, measurement devices. Each one bore the same logo stamped into its casing: Arata Research Institute. She approached a spectrometer with a shattered screen, dust thick across its surface. Her fingers traced the logo. Dr. Arata had been here. He'd worked here, or supplied equipment here, and she'd run past this building forty-three times without knowing. The discovery didn't narrow her search—it expanded it. If his equipment was here, it could be anywhere in the city. She'd been looking for the wrong things, scanning faces instead of searching for the traces he'd left behind. Mirai activated her scanner and began documenting every piece of equipment, every serial number, building a new search pattern. The question wasn't where Dr. Arata had gone. It was where else he had been.