Memphre

The first mech of the anti-Aggressor armored battle vehicle "Serpent".
Humanity's first weapon developed for Aggressors not only as a vehicle, but also in all kinds of weapons.
The development project started only in two days after the invasion of the Aggressors. After giving up on the introduction of new technology and focusing on the expansion of the know-how from the previous generation, the mass production of it was started in half a year.

Because it has an endless orbit, it is generally called a "tank", but the main cannon is a 40mm gun and does not have a howitzer which all tanks are equipped with.
Although innovative technology has not been incorporated, it has excellent stability due to its solid foundation design. Even now, which will be nearly 12 years after its first introduction, it has continued to be active in a single line with only minor modifications needed such as to deposit alkane coatings on its armors.