Arthur Langerak is an adult Sim living in Lunar Lakes. He is engaged to Gloria Goode. He shares his last name with members of the Langerak family from Sunset Valley; due to the fact that Lunar Lakes was founded by Sims from multiple neighborhoods, it can be assumed that Arthur is a descendant of the Langeraks. Alternatively, Arthur may be a descendant of Kaylynn Langerak from Pleasantview, as he has her hair (which is naturally blond) and green eyes.
Arthur Langerak begins the game 15 days away from becoming an elder. He starts the game holding the job of Filing Clerk in the Business career track. His biography states that he fantasizes about quitting his day job and becoming a professional guitar player. His job performance is far beyond negative which might get him fired from his job. Initially, he has 5 guitar skill points and 1 handiness skill point. In his inventory, he carries a guitar and the novel, "Do I Exist?".