Guy is a secondary antagonist in Venus Versus Virus, serving as a loyal henchman to the main villain, Sonoka. He is easily recognizable by his teenage appearance, with orange hair that falls to his shoulders and brown eyes. Distinctive physical traits include a facial mark, and his typical outfit consists of a jacket, pants, collar, and fingerless gloves, leaving his midriff exposed.

In terms of personality, Guy is described as having a nature similar to his fellow servant, Ruka, who is known for her sadistic tendencies. As a devoted follower of Sonoka, Guy is motivated by a desire for power. Sonoka ultimately grants him and Ruka the enhanced abilities they crave, specifically to obliterate the series' heroines, Lucia and Sumire. His backstory, along with that of his companions, is explored in the manga, providing depth to his role as a villain and revealing his motivations within the larger conflict.

Guy's primary role in the story is to act as an obstacle for the protagonists. He engages in dangerous confrontations with Lucia and Sumire, proving to be a formidable opponent. In one encounter, he succeeds in injuring Lucia, leading to a subsequent battle where Sumire must come to her partner's aid. His key relationships are with his master, Sonoka, and his fellow henchman, Ruka, with whom he often works. He is a member of the inner circle of villains who serve the greater evil, Aion, in his plot to destroy and remake the world.

Guy possesses the supernatural ability to control the elements of fire and earth. The anime also specifically tags his abilities as relating to fire control. These powers make him a significant threat in battle, capable of directly challenging the skills of the Venus Vanguard monster hunters.