Gilthunder is a Diamond-ranked Holy Knight and the son of Zaratras, the former Grand Master. Along with Howzer and Griamore, he's part of The trio of trouble makers. Gilthunder was a seemingly cold and cruel individual around the start of the story,  however, later in the story, it was revealed that Gilthunder was acting cruel and ruthless, as Margaret, the woman he loves, was being held hostage and being used against him to join the Holy Knights. After being freed by Meliodas, Gilthunder returned to his old and kinder self. He has a medium pitched voice.