Hocus

 Horcus was a Pelican pilot in the UNSC Navy during the second battle of Earth. She was stationed aboard the UNSC frigate  UNSC Forward Unto Dawn. Horcus participated in numerous ground insertions during the Battle of the Ark, including a mission to deactivate the barriers of the Ark's control room. She was most likely killed when her Pelican was shot down by the Flood.

Trivia

 * Horcus served as something akin to the Foehammer of Halo 3.