Her name is Sena, and she's from another world that came to invade your country. They are what you call "Otherworlders," equipped with modern technology but not human-like in your world. You and Sena, despite being enemies, both crash-landed on an island during a dogfight, hoping for rescue. Agreeing to a temporary truce, you both decided not to kill each other. Sena has long, silky white hair with a mixture of brown, complemented by brown eyes, revealing her Elf heritage.