Grynewaht is a churlish brute, possessing only the most rudimentary grasp of strategy and tactics and relying on overwhelming strength of arms to crush his foes. He takes great joy in running down his enemies. He also tends to bare deep-seeded grudges.
Though lacking a strategic mind, Grynewaht is a formidable combatant, wielding both a gunhammer and a gunshield, similar to Nero tol Scaeva and Rhitahtyn sas Arvina, respectively. His tremendous strength and battlefield aptitude is implied to be the only reason he's as high-ranked as he is; he is, if nothing else, a survivor.
The Far Edge of FateEdit
Grynewaht is first introduced in The Far Edge of Fate as a minor antagonist, sent by the Garlean Empire to the Carteneau Flats as a scout. As the Warrior of Light arrives in Carteneau in a bid to reactivate Omega, they are intercepted by Grynewaht, who engages in a furious battle to capture the Warrior of Light and their allies. Thanks to the assistance of Nero, however, he is defeated, and he quickly flees upon realizing that his forces have been routed.
Grynewaht returns as an imperial officer stationed in Gyr Abania. He leads the field test of a new series of Magitek automatons, which is interrupted by an ambush orchestrated by Raubahn Aldynn and the Warrior of Light. Recognizing his old nemesis from Carteneau, he gleefully deploys the experimental technology against them, only to find himself once again defeated and having to flee. His incompetence and cowardice earn him a demotion from Zenos yae Galvus, and he is sent to serve as the bodyguard and muscle of the acting Viceroy of Doma, Yotsuyu.
He accompanies her to the fishing village of Isari on a mission of terror. Through chance circumstance, they happen upon Gosetsu, who willingly lets himself be captured to forestall the execution of the Isari villagers and give the Warrior of Light and their allies time to formulate a counterattack. Grynewaht takes great pleasure in pummeling Gosetsu, though soon ends up frustrated by the samurai's refusal to reveal to them the location of Hien. He is eventually forced to flee along with Yotsuyu when the forces of the Confederacy - rallied by the Warrior of Light - drive the imperials out of Isari.
Following the failed assassination attempt on Zenos by Yugiri Mistwalker and the Warrior of Light, slapped by Yotsuyu when he attempted to helped her up following being thrown to the ground by Zenos, Grynewaht learns the Warrior is Doma while delighted of receiving orders to kill the adventurer's group. Grynewaht pursues his quarry the Azim Steppe with a platoon and magitek automatons. Unfortunately for him, he arrives a moment too late: the Warrior of Light, having won the title of khagan, is backed by the united might of the steppe's Xaela tribes, and he is once more defeated and forced to flee.
Motivated his own desire to become strong enough to have his revenge, Grynewaht is subjected to an unspecified "procedure" at the behest of Yotsuyu. It resulted with Grynewaht turned into a magitek cyborg monster, serving as Yotsuyu's last line of defense during the Liberation Front's attack on Doma Castle. Grynewaht engages the Warrior of Light in a suicidal frenzy before he was finally defeated.
Grynewaht is fought as a boss on four separate occasions. The first three are storyline battles occuring in Carteneau Flats, the Fringes, and the Azim Steppe. The final battle, against Hypertuned Grynewaht, takes place as the final boss of the Doma Castle duty.