Born into a prominent family, Bristol is a very intelligent, yet hypocritical man. He achieved a good social status at a young age and has received several awards for his charity activities, but he uses this to hide his true personality. He is really a heartless, ambitious man that is able to do anything to get what he wants.

In recent years, he got a high rank inside the Gartheimer's company. Even with the success in his life, Bristol's ambition was to go beyond that; he made a pact with demons, so in exchange for supernatural power he must bring destruction and pain into the world. His true identity is Bristol-D, the final boss of Groove On Fight.