Defender

Defenders are the next step beyond melee specialists. While defenders employ many of the same tactics, they have one thing the melee specialists lack: a shield. This makes them more likely to get close enough to you so they can hit you with the massive hammer they carry. The force of their hammer blow is enough to knock most foes on their tailpipes.

Transformers: War for Cybertron (DS)
Defenders were common during the Great War.