Manasvin Warmech is a boss fought three times—twice in a row as the game's first enemy encounter (tutorial battle), and once more in Lake Bresha. In Hanging Edge it is fought by Lightning and Sazh. In Lake Bresha Manasvin Warmech has more devastating attacks and it is fought by Lightning, Snow, and Vanille.
A more powerful model, called Anavatapta Warmech, is a similarly "cinematic" battle, as Lightning starts the battle with Odin in Gestalt Mode at the opening of chapter 12.
One of Sanctum's feared militarized units, this warmech can act autonomously and is unstoppable until it has completed its set mission. The buzz saws on each arm are fearsome, but worse yet is its terrible Crystal Rain attack.