Claire Kuska is a lieutenant in the Galaxy Federation military, initially assigned to the starship Millennia Amour. Despite her officer rank, persistent financial hardship forces her to take menial jobs outside her duties to manage personal debts. Her operational duties lead her to arrest the space pirate Jannis, acting on an anonymous tip from Shiunk regarding the theft of the Virginia gem.

During this case, she encounters Taiyo. Like other women in the narrative, she becomes romantically involved with him due to his perceived skills in intimacy and acts of kindness, fostering loyalty towards Taiyo. Following these events, she transfers to serve under her superior officer, pirate hunter Yvonne F. Ayano. This reassignment coincides with an expected demotion, resulting from operational failures linked to Jannis's capture and complications stemming from Shiunk's actions.

Her development illustrates the tension between her disciplined military role and her personal vulnerabilities, including financial instability and emotional responses. Positioned among female characters drawn to Taiyo, her susceptibility to his influence during their encounters is highlighted. Her trajectory culminates serving under Yvonne while anticipating a reduction in rank and status as a direct consequence of the mission's outcome.