Cartoon character design of a robot with different expressions

Game concept art sheet of various cute robot creatures with different shapes and sizes, each one has a glowing blue crystal in their chest or back that glows softly. They all have arms made of white plastic that glow with an inner light, some holding books or digital devices. They wear dark gray material and sit on a grey background, some are floating above the ground. Cute and adorable with a cartoony design style and simple lines, a white border around the edges. The art is in the style of a simple cartoony design with simple lines and shapes.

(worst quality, low quality:1.4), ugly, ((blurry)), bad anatomy, disfigured, (EasyNegative:0.5), boring_e621, watermark, badhandv4, bad_prompt_version2-neg, By bad artist -neg deformed, mutation, disfigured, blurry, bad anatomy, poorly drawn face, extra limb, extra ear, extra hand, extra finger, multi tail, multiple tails, horror, ugly, out of focus, depth of field, focal blur, missing arm, missing hand, ((deformed hand)), ((poorly drawn hand)), (border), signature, text, writing, letters