Alrik is found near Champion Harbour in the Orobas Fjords on a low cliff with huts, directly south of the entrance to Raze's Flying Fortress. He is accompanied by a bunch of other imps and claims to be king of the imps. He also talks funny, using the word "yukie" frequently. He immediately talks to you saying something along the lines of "Yukie Alrik is king of the yukie imps, not yukie yukie you!"
After he is killed, you find the book titled Yukie for Dummies, which is about communicating with "yukie" humans. His necklace is required as proof of his death for the quest A Hunting We Shall Go Again.