Booger is an eccentric "slime" girl who lives at her own pace and does as she pleases. Though she looks strange and quite possibly toxic, she's very friendly and lax, and is always eager to hang out with others.

Nobody seems to know Booger's origins or where she came from, as she purposefully avoids talking about her life. However, she is constantly talking about a "special treatment" she underwent that changed her life for the better, leaving her more extroverted and happy - and wants you to undergo the same.

In actuality, Booger is a slug - or that's what she was before her body was taken over by a parasitic worm! Her original conscious is currently unwillfully trapped within her own mind, allowing the parasite full control of her body.

The original Booger is now forced to watch as the worm piloting her body spends her money, works her job, and charms everyone around her - essentially living her life better than her!