Jack is the captain of a small five man unit of Blitzkrieg Corp White Knights. The aesthetics of his unit's armor was heavily modded to the point of gaudiness, with Stella describing them as looking like "a squad of Henshin Heroes."
Jack managed to break through the software of his armor and disabled the remote switch that locks it. Thus after most of the White Knights' armor was disabled and the entire organization was disbanded, Jack and his squad posses the only known working suits of White Knight armor. This has made him and his squad some of the most wanted people in Glitch City.