Department H

Heather was born in Calgary, Alberta, Canada. She was originally a secretary at Amcam corporation, where she fell in love with James MacDonald Hudson. After he had stolen his power suit to prevent it from being used as a military weapon, Heather discovered his secret and decided to share it with him. Soon after they were married. Heather supported her husband in the forming of Department H and his becoming a superhero. She also assisted Wolverine in a time of trouble before his career with the X-Men, and was later reunited with him. After Department H is dissolved, Heather brought the members of the disbanded Alpha Flight together to battle Tundra. With this initiative creating a spectacular success, the team decided to continue operating Alpha Flight as an independent group. Before Alpha Flight had been back together before long, Heather had witnessed the apparent death of James Hudson. She was then injured attempting to rescue a child from an alien Plodex.

Leader of Alpha Flight

Heather is asked by the members of Alpha Flight to take over leadership of the team when her husband James, the leader of Alpha Flight, is apparently killed. She accepts, though initially she leads purely as a non-combatant. She led Alpha Flight on a mission with the X-Men, and was temporarily transformed by the mystic Fire Mountain. She was briefly "reunited" with what she thought was James Hudson, but who really turned out to be an impostor - the robot Delphine Courtney. Her body was temporarily distorted by Scramble, and then she was captured by Deadly Ernest. Eventually, these dangerous encounters led to Heather adopting a copy of her husband's battle-suit. Through extensive training by Wolverine, Heather is able to hold her own in a battle. Heather teamed with Wolverine against Lady Deathstrike, and took the name Vindicator. She became stranded in the Savage Land, and formed the mutated natives into a team called Alpha Prime. Some time later, Heather was forced to defend Alpha Flight in a Parliamentary hearing. Eventually her husband returns and her suit is altered to manipulate geothermal forces and she takes the name Guardian. Soon after that, she battled the Fantastic Four. Heather and James have a baby (an as-yet-unnamed girl) and travel with their child and several other members of Alpha Flight to return a clutch of Plodex eggs to their homeworld. In addition, an accident brings temporal copies of most of the original Alpha Flight - from a time before her husband's "death" - to the present. This group includes a copy of Heather. While she is not a member, this "new" group is active as Alpha Flight.

Death

Alpha Flight (the team consisting of Sasquatch, Guardian, Vindicator, Shaman, Major Mapleleaf II, and both Pucks) are brutally attacked by a new villain, "the Collective." Their bodies are left in the Yukon Territory as the Collective continues on to the United States. She was later confirmed dead by Sasquatch, who claimed to be the only surviving member of the team.