Create a small, toonish, low-poly 3D character inspired by the style of characters in the Mob Control mobile game. The character should be humanoid, with a slightly exaggerated cartoon style — large head, small body proportions. Unlike Mob Control characters, add unique features: give the character expressive eyes with a slight glow, a playful smirk, and a small backpack. Use a simple color palette with bright, cheerful colors (like pastel blue and yellow). The character should look suitable for a casual mobile game and be ready for rigging and animation. No textures, just flat colors. Keep polygon count low.