Gear

Gears are a type of battle suit that make their appearance in Xenogears. They are piloted similarly to a vehicle but have human-like proportions, much similar to other types of robot mecha.

Appearance and properties
Gears take on a wide variety of appearances due to their varied nature. A constant in their designs, however, is that they are made from a type of metal alloy that gives them a clean, stainless look. Another common factor is their hulking stature, most Gears stand taller than buildings and even sometimes entire cities. Most are bipedal and humanoid (with exceptions like Haishao and other animal-like Gears, or vehicle-like Gears often found as generic enemies). Almost every Gear has a cockpit, similar to aircraft in the real world (with the exception of Wel-Gears like Seibzehn).

Gears are used for a number of reasons, however most Gears seen within Xenogears are used for combat. As such, they are often equipped with guns, whips, swords, and many other varieties of weapon. They also operate on a fuel system, which means they can run out of ammo and energy (thus rendering a Gear that isn't properly equipped useless).

Lore
The Gears were once a part of the Eldridge. Their function on the ship is entirely unknown, however the Gears are controlled by the Zohar's master generator, which would imply they were intended to have some form of functionality with it.

In the modern day, many Gears have been excavated from ruins by the Ethos. They were distributed across the Kislev and Aveh nations to aide each country in the war with one another. Close research and usage of the Gears by humans allowed for the creation of Kislev and Solaris-made Gears.