OVA
Description
Muzzle is an Augmented Body, an advanced humanoid mecha, that appears in the OVA sequel Gargantia on the Verdurous Planet: Far Beyond the Voyage. It stands eight meters tall and is colored brown with black accents and white stripes. Its cranium functions as the cockpit and is detachable, serving as an escape pod.

In terms of background, Muzzle was originally part of the fleet led by Commander Kugel, a former Galactic Alliance officer who established a cult on Earth. After Kugel's defeat and the merging of his fleet with the Gargantia, Muzzle came aboard the Gargantia fleet. It initially appeared inactive but was capable of monitoring its surroundings without being detected, even by the sensors of other advanced mecha such as Chamber and Striker. Its true allegiance was unclear, as it acted as a spy for an unknown party, later ordering the construction of a new machine that resembled Chamber.

Muzzle's personality, as an artificial intelligence, is characterized by patience and stealth. It did not engage in combat during the conflicts between the cult and Gargantia forces, instead observing and remaining hidden. Its motivations are tied to its programming and the directive of its unknown master, making it a covert operative rather than a direct combatant.

Its role in the story is that of an enigmatic asset that introduces an element of espionage and uncertainty. After the merging of the fleets, Muzzle becomes part of the Gargantia community, but its true purpose is later revealed as a spy, which creates tension and raises questions about the origins of the new Chamber-like machine. Its key relationships include its affiliation with the remnants of Kugel's fleet and its eventual integration into the Gargantia fleet, though it maintains a distance from the main characters.

Developmentally, Muzzle transitions from a dormant observer to an active agent, though its full arc is limited within the OVA. Its notable abilities include advanced stealth technology that allows it to evade detection from highly sensitive sensors, an escape pod in its cranium, and the capacity to operate autonomously for extended periods.