Azmuth's Father

Retaliator is a "villain" in Ben 10: Destroy All Aliens.

Backstory
Retaliator is Azmuth's father. He wears a piece of technology known as "Mechamorph Armor". The Mechamorph armor wraps around the user and transforms them into a blue Galvanic Mechamorph. Retaliator was looking for Azmuth when he found that Azmuth's ship had been destroyed by Evil Way Big (which ironically, was Azmuth transformed by feedback from the Omnitrix) then he went searching for the To'kustar that had killed his son.

Galvan
Retaliator looks like a regular Galvan when he is in his Galvan form. For some reason Retaliator looks younger than Azmuth.

Mechamorph Armor
In his Mechamorph Armor, Retaliator is blue and black and white instead of the regular green and black and white. He can also morph his body into an armor.

Personality
Retaliator was shown to be aggressive, but this was due to believing his son had been murdered and the fact that the Mechamorph Armor makes the user much more aggressive than usual. He was bent on vengeance for his son.

Powers and Abilities
Retaliator has regular Galvan intelligence. With his Mechamorph Armor he also has great strength along with a variety of weapons.