Zero 5

Zero 5 was formerly Piper, the vermin eye, during the time of Harmonic Heliah. Zero-5 appears to be mentally unstable, having an extremely short attention span and loves living in a rat-infested cell. Zero 5 appears to be "friends" with Zero 8, being in adjacent cells and talking in sporadic intervals with each other.

Zero 5 has the ability to control corrupted rats and use them as sentinals. Through her rats, she has all of Staff under her surveillance.

Zero 5 delivered Rae a message given from her handler, "Silence is golden". Rae understood and told her to forget it, which she immediately did. Then, Zero 8 told Zero 5 to give Rae a rat to guide her to Melaine, no 10, to see new war potentials.