RX-121-1 Gundam TR-1 [Hazel Custom]

RX-121-1 Gundam TR-1 [Hazel Custom] is a Titans Test Team mobile suit from Advance of Zeta: The Flag of Titans. Built from a GM Quel base and modified into a Gundam-type test unit, it became the foundation for the broader TR-series development programme. It is closely associated with Wes Murphy and later Titans Test Team pilots.

The Hazel Custom combines the practical mass-production roots of the GM Quel with a Gundam-style head, enhanced equipment and prototype test parts. Its role is not simply to be a powerful suit, but to gather data for future Titans machines and optional equipment systems. With its dark Titans colours and modular upgrade potential, the Hazel Custom is one of the most important and recognisable Advance of Zeta designs.