As a mole hog, Louis tended to keep underground and lived a timid life, fearing any adventure or danger that might come his way. Louis preferred to live safely, traveling underground through tunnels, and not engaging in any risks, keeping a cool head in any troublesome situations; despite his timidity, however, Louis was capable of stepping up to any that caused trouble or danger for those he cared for.

Unlike other molehogs, Louis had a shortened snout and a pelt that was grayish in hue, an uncommon trait for his kind at his age, along with a crop of brown scalp hair, small ears, brown eyes and pale facial fur. With short, clawed limbs and a small, compact body, Louis was a speedy digger that could tunnel through any surface, be it earth or ice, relatively quickly, though his tunneling often led him to not see what he was heading towards on the surface. Along his back, Louis sported short spines that he could stick out when he rolled into a ball.

Louis seems to hold more likable traits including: great dependability, resourcefulness, calm under siege, intelligence (as he is referenced as a nerd), shyness (being "soft-spoken") and a tad bit of nervousness.

He enjoys digging, as shown when he says:

"I'm a Molehog, it's what I do. To me, it's fun."