Claudia LaSalle serves as a bridge officer aboard the SDF-1 Macross, managing weaponry systems and navigation operations. She shares a close friendship with fellow officer Misa Hayase, frequently offering counsel on Misa's personal matters, especially regarding her romantic involvement with pilot Hikaru Ichijyo. Claudia balances professional competence in critical duties with an informal manner during quieter moments.

Her personal history includes a significant relationship with Roy Focker, a skilled fighter pilot and squadron leader. This relationship ends when Roy sacrifices himself during a mission aboard a Zentradi vessel, securing the escape of Hikaru and Misa. His death occurs away from her presence, contrasting with their dynamic where she often accommodated his unpredictable behavior. Following this loss, she continues her duties without the film depicting prolonged emotional aftermath.

Throughout the SDF-1's engagements with Zentradi forces, Claudia remains stationed on the bridge, participating in strategic operations during major battles like the initial evasion near Saturn and the final assault against Boddole Zer's fleet. Her operational role persists during the implementation of the human-Zentradi truce.

The film concludes with Claudia surviving the conflict and appearing during the rebuilt Macross sequences. Her portrayal across the broader Macross continuity confirms her enduring presence beyond the main events. Later media, such as archival footage in the "Flash Back 2012" OVA, reinforces her survival and ongoing role without adding new development or backstory.