Larsen
Larsen was a Human Starfleet officer during the 2370s, as played by a member of Species 8472. 

In 2375, the Species 8472 member who impersonated Larsen trained at Terrasphere 8 for infiltrating the Federation. In that recreation, Larsen was assigned to the Federation Council to serve as deputy liaison officer by Admiral Bullock. ()

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Species 8472
Starfleet Headquarters personnel
Starfleet command personnel
Humans
Aliases