Kanichan

((One of the Mystia_Alts.)) (The first character picture was graciously drawn for me by Jermod, though it's still WIP, and the character was created for the Oouna_Monogatari setting.)
Kani-chan (Or "'Li'l Crab", alternately. Also, neither of those are her real name, it's simply a nickname because her actual name is unpronounceable to humans.) is a young, crab-type Mizugami that is in the Ningyo stage, which is the youngest and weakest form of Mizugami development. (In layman's terms, you could simply call her a crab-girl.)
Despite being young, however, she's got quite the fiery personality, and can be quick to anger, especially if a human is around. Like most Mizugami, she absolutely despises humans. Even though she's rather low on the food chain compared to humans and other Mizugami, her personality makes her quick to pick fights. She's not one to let something simply hunt her down, and gets indignant if someone goads her, teases or insults her, or calls her names, though can be easily tricked because she doesn't think straight when she's angry.

((Second picture, drawn by TenaciousTinkerer: