What Do I Do After Transmigrating into a Wasteland Pollutant?

Jian Sui wakes up in a polluted wasteland, a world crawling with mutated contaminants. The good news: A safe haven remains at the center of the world, the last spark of human civilization. The bad news: Jian Sui has been reborn as a contaminant, hated and hunted by everyone. Jian Sui: …??? (rolls over in shock) (squirms) (squirms) (crawls around) ? Wait, no. Becoming a contaminant is one thing, but what's with this weird way of moving? This bizarre point of view! What kind of species is she, anyway!! * In New Era Year 137, humanity has retreated to the Safe Zone, diligently protecting the hard-won peace. One day, the Information Department discovers an unusual contaminant. It has no definite shape and is as weak as an ant, yet it possesses the legendary hundred-percent contamination level. Or rather, it is contamination itself. It can steal the forms of any contaminant and adopt them as mutation paths. It is the future ruler of the contaminants. Most despairing of all, humanity's vaunted contamination defenses are utterly useless against it! Humanity is terrified, unable to sleep at night. Then one day, the entire region's network is illegally breached. A contaminant appears of its own accord on countless screens throughout the city and, before everyone's eyes, transforms into a girl. "Hello, everyone. I'm Jian Sui." With a smile, Jian Sui boldly announces her arrival to all of humanity. * Jian Sui takes becoming a contaminant in stride. The only downside is that she's a blank slate with no stats at all. Luckily, she can gain powerful skills by devouring the cores of contaminants! Every contaminant she clears gives her a new skill! Then she discovers a human base storing a huge number of contamination cores… Humans: Don't come any closer!! Jian Sui: Don't be scared. I'll only have a tiny little bite ^_^ ★ Female-led, plot-focused story with a light ensemble cast. The love interest is nonhuman. ★ The heroine is immortal, so the premise is completely overpowered. Theme: Simple wishes: may each year bring peace.