SeVen is the dark and evil split of the director of the film.
The "V" in his name is capitalized, just like the director, hence he is the dark split of the two. As well as for his number symbol. (Je'Von = SeVen)
"SeVen" was almost a movie. Assistant Director, Katrina, knew a few people in the video industry while in college and got sent down to professors who could've made it hit TV. Unfortunately, JeVon had no way to get to New York at the time.
SeVen can only be physical and present during a Blood Moon. Until then, he would need to be attached to a host to do his work for him.