Say hello to Nu the most flexible of the breachers. Nu has managed to modify his gun into a wave emiter. His special ability is to change frequency of those waves. That changes his 1. Fire Rate 2. Damage 3. Speed 4. Defense. Nu can be in many forms from a speed demon, through a balanced character to a slow defensive tank.
The Skull I used on that sprite is by @netheri. Everything else by me. I googled up that meaning of Nu is the fequency of waves such as rentgen waves and so this idea came to life.