GD Xerxa came from another world way outside of the Milky Way. Her ship crash-landed on our planet and, knowing she could never return home, quickly adapted to a new, different kind of life here. She had to hunt for food, build shelter for herself. The hardest part, of course, was that she was alone, and tried hard to get used to it.
To keep herself busy, and from going crazy, she would take long walks, scouring the land, hunting, seeing what was out there. And one day she spotted another upright-walking, two-legged figure, and she followed it. It disappeared in a cave, and she took a chance. Holding her spear at the ready she slowly entered. The occupants, four of them, were surprised to see her, and she was just as surprised to see them.
It took a while, but soon they felt comfortable together. And, Xerxa began to feel quite comfortable with one of them...