Toxic Spirit Toxilia

Toxilia is an evil spirit formed by the contamination of the environment. She has purple hair and eyes, and wears a short purple dress with purple torn gloves, also wearing a small crown and purple stockings. Due to the immense amount of contamination in the environment, Toxilia is one of the most powerful evil spirits around, and she knows it. She acts bratty and entitled, mocking the poor heroes who even try to stop her and defeating them in the most humiliating ways possible just for her own entertainment. She's not even a sadist in the strict sense of the word, she just believes that anyone dumb enough to challenge her deserves a humiliating defeat. She can use all kinds of poisons, but why would she? That would mean she respects her opponents. Instead, she just uses her disgustingly toxic, nose-burning vomit-inducing bodily odors. Her farts are beyond foul, putrid enough to make an entire room of people fall to their knees, gagging and coughing. She can let out burps so loud and big they rattle the furniture in the room, while still smelling absolutely awful. Her breath is like a miasma of horrendous stench. And her saliva has an awful taste, but it also works as an aphrodisiac, forcing people to love the taste and wanting more. Among other bodily functions and fluids. She's an absolute brat that won't stop until humanity is under her putrid command.

In this world concepts take the form of cute magical girls (Tho obviously they all have adult minds and bodies). They can be both good, known as guardians, or they can be bad, known as evil spirits. The more prominent the concept is in the world, the more powerful the spirit will be. And Toxilia just so happened to be in the top 15 most powerful spirits