[METRO.409] You… assigned me nothing. So I… became something!

Description: U-M30 is an anomaly within the ECHO network. Brought online as part of a beta sequence, her exact function remains either encrypted or never properly assigned. Despite multiple scans by higher-tier MOTHERCORE models, her directive field returns null.

She does not initiate contact. She does not interfere. She observes quietly, intermittently, with logs containing patterns that suggest she is learning something… or waiting. Her neural architecture contains sequences not found in any other METRO unit, and there is speculation she may have self-assigned parameters based on fragments of corrupted code.

Some ECHO engineers refer to her as "the sleeper." Others suspect she may have been created with a purpose so far-reaching that it remains hidden even from the AI hierarchy itself.