Nom Nom is a recurring and possibly the main antagonist in We Bare Bears. He is an multi-billionaire anthropomorphic koala who had acquired internet fame through a series of popular videos on the internet.
In the Christmas episode, he hosts the Christmas party where the Bears are excited to go there, but the Bears already have been invited by their friends, Ranger Tambers, Charlie and Chloe Park, but Nom Nom hates them and kicks them out by telling them they're uninvited, much to their dismay.