Louis is a mole hog and a supporting character in Ice Age: Continental Drift. He is Peaches' best friend and a bit of a coward. A soft-spoken, timid mole hog, Louis was always at Peaches' side, faithfully staying close by and always ready to help her when she needed it. He also appears to have a crush on her, but she seems utterly oblivious to it. He is voiced by Josh Gad who later played Olaf in the 2013 film, Frozen.
Ice Age: Continental Drift
Louis first appears with Peaches in the forest, going towards the falls, where the teenagers hang out. Manny finds them and tells Peaches she shouldn't be out on her own. When Louis tries to point out that she isn't alone, Manny says that he doesn't count, as he is a weiner.
He later sneaks off to the falls with Peaches, despite his protests, and gets left behind when Manny finds her. Louis is later seen back near the falls, on a collapsing frozen waterfall, and is saved by Peaches, who he lovingly stares at. Peaches then carries him off on her trunk.
Louis later overhears Peaches saying they weren't friends to Ethan and the Brat Pack, which upsets him greatly. He lets Peaches know he heard her, then tunnels away.
When Gutt beats the Sub-Zero Heroes to the continent, he takes Peaches, Ellie, and the rest of the herd hostage. Manny voluntarily came aboard Gutt's ship to exchange himself for his daughter, but Gutt went back on his word, stating Manny took everything from him and the callous captain intended to do the same. Manny tried to charge at the evil captain, but the crew rapidly lassoed him. Just as all seemed lost, Louis then stood up to the big ape.
Amused, Gutt accepted Louis' challenge, telling Gupta to let the molehog have a weapon. After a few struggles, Louis managed to unearth the huge knife and fearlessly pointed the knife at Gutt. Louis then threw the weapon into the air, distracting everyone as he burrowed into the ice, popping up by Gutt and smashing a heavy piece of ice onto Gutt's foot. The pain distracted Gutt, enabling Peaches to escape as an all-out brawl between the Sub-Zero Heroes and the pirates ensued.
In the end, Louis is finally allowed to hang out with the Brat Pack and Manny lets him and Peaches explore their new home, due to Louis' bravery.
Ice Age: Collision Course
Louis only appears in a small cameo at Manny and Ellie's anniversary party. During this, he seems to look slightly saddened while he drinks his beverage, possibly saddened due to Peaches‘ engagement to Julian as the mole hog had feelings for her. It is unknown what happens next, but he is not seen at Peaches‘ wedding, despite being her best friend, hinting that he left the herd.
- Louis is voiced by Josh Gad, who would later voice another ice-related character: Olaf.