The character is a punk humanoid rat and we can call him just Rat. The uploaded image shows Rat getting out of his secret sewer tunnel exit and it's almost good. Make it in a slightly closer view and choose better textures on the metal of the sewer. Rat can use a black leather rock n roll jacket, jeans and Military boots. The hair is a mohican cut, very punk style. Rat's face fur is light gray, with black sunglasses, and he carries an electric guitar crossed at his back.