Developed after the Shadow Nexus infiltration incident, the Aegis Protocol became Steel Eagle's ultimate safeguard. Its machine-learning algorithms analyze behavioral patterns to identify potential traitors. Commander Thorne authorized its implementation despite ethical concerns.

The protocol exists as distributed AI nodes across Steel Eagle's neural network. It possesses real-time access to all operational data streams and biometric feeds. Its decision algorithms cannot be overridden below command-level authorization. The system executes containment procedures with lethal efficiency.

Serves as Echo Sentinels' invisible enforcer, maintaining absolute loyalty within Steel Eagle's ranks. It neutralizes dissent before operational security can be compromised, making it both feared and revered.