Sara Cross
General information
Affiliation and military information
AffiliationArtificial Intelligence Offices, IBIS
OccupationAIO liaison, Second Layered Administrator
Real world information
AppearancesArmored Core: Silent Line

Sera Cross is a character in Armored Core: Silent Line. While at first appearing to play a minor role, it is later revealed to be the main antagonist.


An enigmatic woman working for the AIO, who occasionally relays supportive information to the player; however her motives appear to be rather questionable. The player saves her in "Power Plant Emergency" and she maintains contact with the Raven. As the story progresses, it is revealed that the technology that her company, the Artificial Intelligence Office, has been providing is now going berserk and that she is nowhere to be found. After it is revealed that she is somewhere behind the Silent Line, the Raven is sent in to investigate in the newly discovered Second Layered.

In "Attack Unexplored Region," it is revealed that Sera Cross is actually IBIS, the Controller of the Second Layered. After a grueling battle, the Raven defeats her and frees Second Layered from IBIS's control.


  • Sera is the only AI character who cries out in pain when defeated as opposed to others who simply repeat a pre-recorded message upon destruction.