Numbuh 575 was a KND operative who turned 19 before he finally got caught for Decommissioning*. He led Numbuh 57.5 out of his cell. No-one knows what he actually looks like properly, and most of the time he communicates through diagrams with his voice telling them what is going on. If he is really needed by Sector Z Mark 2 , he'll use his old armour and 2X4 Tech to get to them.
- They still didn't Decommission him.