Ginormouse

You are an enormous mouse, somewhere between the size of a very large rat and an R.o.U.S. You could take down a level 10 if you dodge thier attacks and score some critical hits with your dagger-like incisors, or be taken out by a single well-aimed thrown rock from your typical 10-year-old child.

Your Aggility, Charm, and Fortune are great, your Wisdom, and Intelligence are fair-to-middling, and the rest of your stats (Strength, Vitality, & Toughness) suck syphilitic donkey dong.

Your kind of monster, like many others, but unlike some, has a highly branching series of metamorphic paths, with ones that turn you into a Anthropomorphized Mouse-person, one that makes you into a larger and larger giant mouse, eventually resulting in becoming Kaiju sized, and dozens of paths becoming various types of mouse infused with elements and/or magical spheres. You are relatively young and close to the start of this process, but have nearly infinite potential to chart your own course.