Helen Calypso

"She's one deadly lady; knows how to hold herself in a fight, with or without weapons. But she's just as good at subterfuge - she can pretend to be anybody; anything from lowly prostitute to snobby rich kid is easy game for her."

- Captain Aaron G. Gibson about Helen 'Vector' Calypso.

Helen Calypso, better known by her callsign, Vector, was an elite assassin affiliated with the Office of Naval Intelligence Section III sub-division Black Operations Group (BOG) during the Human-Covenant War. She was renowned in the covert community for her deadly efficiency. Over time, she became the private grim reaper of Captain Aaron Gibson. She reportedly has a history with Laszlo-108, though exactly what this is about neither of them are willing to share.

For unexplored reasons, she joined Laszlo on Operation: SAVIOUR to locate John-117. Once the operation was called off, she was reassigned to the Special Operations Command and enlisted as an officer in the SPARTAN-IV Program, Albion Company.

Human-Covenant War
Little is known about Vector's life, except that she was born and raised on Harvest to a family of farmers. When the Covenant attacked, she numbered among the survivors. Once she was grown up, she joined the Navy, applying for a variety of Special Forces programs, which served as her bridge head into ONI's operations divisions. There she built a reputation within the agency as being a ruthlessly effective operative. Due to this, she became Captain Gibson's private grim reaper at some point, taking on high-priority assassination and sabotage missions on his behalf.

Necros War
After the Human-Covenant War, she was assigned to accompany Laszlo-108 on Operation: SAVIOUR, which had the side effect of stalling her aging process almost completely, due to near-constant time spent in cryo sleep. After the operation was called off, she was assigned to Albion Company of the SPARTAN-IV Program, acting as commander for Alcazar Squadron.

Trivia

 * The image was taken from Shae Vizla, a female Mandalorian bounty hunter and character in the upcoming Star Wars: The Old Republic game.