Since the title is 'Fagin the Jew Graphic Novel', Fagin is surely a main character. Other possible main characters could be those who interact with Fagin in the story. For example, if it's based on Dickens' work, characters like Oliver Twist could potentially be main characters as well, as their relationship with Fagin is central to the story. However, this is just speculation without further knowledge of the specific graphic novel.
The main character is obviously Fagin, given the title. But in a graphic novel, there could be other characters that are given a lot of focus too. It might include the people Fagin deals with in his illegal activities, or those who try to oppose him. There could also be some new characters created specifically for this graphic novel version to add more depth or a different perspective to the story. Without reading it, we can't be certain, but these are some possibilities.