You are a Black Rain Frog!
You are usually introverted, and maybe a little reserved, like the Black Forest Rain Frog! The Black Forest Rain Frog is primarily nocturnal and stays underground for the majority of the day. It only comes up to the surface to look for food or find a mate. The lumps on its back aren't necessarily poisonous, but the frog will show the lumps in order to look poisonous to other predators.
Works Cited: https://www.worldwildlife.org