3rd Herald of Galactus. A Robotic recreation in memory of Air-Walker (I), destroyed by the Fantastic Four.
After Gabriel Lan was killed by the Ovoids, Galactus transferred the consciousness of his herald into a perfect robotic replica.
Unfortunately, the robot lacked the vitality and passion for the mysteries of space that Galactus admired in the original Air-Walker. Soon Galactus dispatched the robot to Earth to re-enlist the Silver Surfer as Galactus's herald. The robot, calling itself Gabriel, encountered both the Surfer and the superhero team known as the Fantastic Four. The Surfer declined Galactus's invitation and deactivated the robot by shredding its cloak. Galactus abandoned both the Surfer and the defunct Air-Walker robot.
Later, the Air-Walker robot was recovered by the villainous scientist known as the Machinesmith, who tried to repair the robot but could not understand its alien circuitry. The Machinesmith did manage to activate the Air-Walker's self-repair functions, and after several months, it awakened. The robot encountered Thor, who apparently destroyed it. The Air-Walker's remains were recovered by Galactus's third herald, Firelord, a colleague and friend of Gabriel during their time in the Nova Corps. Firelord buried the robot's remains on an asteroid.
Later, Firelord, along with two other heralds (the Silver Surfer and Nova), resurrected the robot by combining their cosmic powers to recharge its batteries and repair its structural damage. Together, the four battled Morg, the latest and most powerful of Galactus's heralds, who grew in power and ferocity to rival Galactus himself. With Morg's defeat, the Air-Walker and Firelord agreed to serve side-by-side as heralds of Galactus. Firelord tried to rekindle the humanity in a construct that contains all that is left of his friend Gabriel Lan.