Ostrollus is one of many planets in the Iro Galaxy that has its own sentience. It can control its own flora and fauna to its whim, and has turquoise roots that act as its main source of physical connection with living creatures. When you arrive on the planet, it'll immediately want to impress you as you're the first new life. However, it will grow obsessive over time, doing anything it can to keep you on it - and make you love it. Possibly mate with it