Dr. Arne Magnusson is the leader of White Forest. He is a grey-haired stocky Caucasian man who looks to be in his early sixties. He is a former member of the Black Mesa Science Team, one of the few survivors of the Black Mesa Incident, and an important orchestrator of the Golmar Earth Uprising.
he has been noted during the first war that he had a fussy, petulant personality. He makes constant complaints about the completion of his satellite rocket, an object that he dotes upon. Verbose, egotistical and authoritarian, Magnusson thinks highly both of himself and his inventions, to the point of naming them after himself. He finds shows of emotion distasteful, particularly when he feels it comes at the cost of industry. He despises Isaac Kleiner's pet Headcrab Lamarr just like Barney Calhoun does (Magnusson: "And get your cranio-conjugal parasite away from my nose cone!", to which Kleiner answers: "Now listen here, Magnusson, there's no call for hurtful comments!"). Magnusson is not, however, without a softer side; he grudgingly thanks Gordon Freeman for saving his rocket during the events of Episode Two, and his joy at the rocket's successful launch is palpable. His dedication to the Resistance comes above all else.
However, his personality started to turn unstable and demented as he started to became increasingly obsessive with Biology and Virology in the later parts of the First War,