Hickman

From Memory Alpha, the free Star Trek reference

Ensign Hickman was a 24th century Starfleet officer who served as an astrophysicist aboard the USS Voyager under Captain Kathryn Janeway. Hickman became stranded in the Delta Quadrant along with the rest of the crew of Voyager in 2371.

According to Commander Chakotay in 2373, Hickman did a passable impression of Captain Janeway. (VOY: "Scorpion")

In 2374, following Voyager's detection of the Omega molecule, Hickman incorrectly believed that the emergency was actually an encounter with Species 8472, and that Voyager was on a mission to seal an opening to fluidic space. (VOY: "The Omega Directive")