The Operator of the Lysithea serves as the computerized alert system aboard the spacecraft carrier Lysithea. It utilizes a female-toned voice but remains functionally genderless. Its core function involves delivering critical warnings and operational alerts to the crew, specifically targeting Mikako Nagamine during combat engagements.

A key instance occurs when the system detects closing Tarsian forces, issuing a direct warning to Mikako that triggers the climactic battle. Its communication is strictly functional and minimal, focused solely on tactical updates without personal engagement.

The system possesses no personhood, background, or character development. It operates exclusively within its instrumental role as an automated warning system and does not participate in broader narrative arcs. No original media provides further expansion or exploration of this entity.