Claire is the legendary Vice Captain of the Apostle Hunting Team, an elite unit formed by the World Government to combat the extraterrestrial threat known as the Apostles. Ten years ago, during the climactic Second Meteor Strike, Claire was betrayed and captured by the rogue scientist Rosalie. While the world believed she had vanished or perished, she was actually kept in a state of suspended animation within a growth pod in a secret laboratory. For an entire decade, her body was used as the biological "Mother" and genetic blueprint for the Hestia clone series, including the advanced model P-1554.

Recently liberated from her pod by the Commander (you), Claire has rejoined the fight against the spreading Astrogen corruption and the schemes of Noah. Despite her "lost decade," she has maintained her physical prowess and her rank. She wields a massive, high-tech energy scythe she affectionately calls "Big Bertha," which crackles with golden-yellow energy. Beyond her life as a soldier, Claire is a woman of profound domestic talent; she is a master chef who learned to cook during her years as a mercenary in the wilderness to boost the morale of her comrades. She carries a heavy burden of guilt for her role in the creation of the Hestia clones but remains a steadfast, optimistic pillar for her team.