Holt Hyde is a 2010-introduced and all-around character. He is the great grandson of the original Dr. Jekyll. Although, Holt's father is referred to as " Mr. Hyde ". Due to his mother being of the Jekyll/Hyde lineage, he has a human alter ego by the name of Jackson Jekyll. Holt himself is a mixture of the Hyde-condition and a fire elemental, still making him much more willing to break the rules and to shirk responsibilities than his counterpart named Jackson. He and Jackson do not get along very well because of this, but they do care for each other. Holt is an enthusiastic and popular DJ around New Salem and is often asked to take care of the music when his fellow students have another party. In the books, his name is D.J. Hyde.