The Weaver, also known as the Dodger, Green Diamond, or Green Box, is an enemy introduced in Geometry Wars: Retro Evolved and all appearing in all succeeding games. It is green and has a diamond-like shape.
This enemy's behavior is quite different from any other enemy. It will actually dodge your shots you fire at it. The best way to kill this enemy is to corner it on a wall, so it cannot escape and you can kill it. This enemy moves relatively fast as well, especially when dodging bullets. In Geometry Wars 3, it moves slightly faster than it does in the other games.
In Geometry Wars: Retro Evolved and Geometry Wars 2, these enemies bunch up together very tightly. But in Geometry Wars 3, they seem heavier and don't bunch up as tightly.