Grimmwolf is a werewolf with a British accent. Grimmwolf's Wolf Crystal ability allows him strength of a wolf, as well as super speed that allows him to rush and spin at his enemies with razor sharp fangs to bite or do a lot of damage to his opponent. He can also fire energy from his mouth at his foes.  

He has a personality that makes him believe he's superior to everyone else, with the exception of his groupmates. He's quite short tempered and doesn't have a problem with challenging authority to those who claim to be stronger than him.

His voice is basically a gruff British accented male voice.