Cold Stone

Cold Stone is the apprentice of Hoverboard, and what could be seen as the main protagonist of Ben 10: The outer stories. He is a Crystalsapien (one of Chromastone's species) who combines his energy-blasting powers with ice attributes. He notably has strong morals (unlike some other mercenaries) and will only accept the job so long as it has good standings. This may annoy some, but it is simply a force of habit.

His powers consist of creatinng an ice slide, making a icicle sword and frost shield, and, if he has enough power, manipulating the weather. He also can reflect his opponent's attacks back at them, though it is notable that he is vulnerable to heat-based attacks.