NA Localization:
A miniature self-propelled fortress created by a peerless genius and piloted by a synthetic Heroic Spirit. Multiple mass-produced versions exist as well.
It may be every bit as adorable as its owner, but it's still highly mobile, brimming with artillery, and it possesses a multitude of capabilities which enable it to adapt to almost any harsh environment.
Fan Translation:
A small self-propelling artillery battery driven by an artificial Heroic Spirit created by an universal genius.
There are several mass-produced models.
Like its master, it has a lovely appearance, high mobility and offensive ability, and it is versatile enough that it can deal with jobs in rough places.