Yes, there are quite a few. You can start by looking on major fanfiction platforms like FanFiction.net or Archive of Our Own. Just search for 'Harry is Skull de Mort' and you'll find a variety of stories with different takes on this concept. Some might explore a darker side of Harry's character in relation to Skull de Mort, while others could be more about a unique friendship or alliance.
One common theme is power. Since Skull de Mort is often associated with great power, the fanfiction might explore how Harry deals with new - found or borrowed power. Another theme could be identity. Harry might struggle with his own identity when linked to Skull de Mort.
Without having read Mort graphic novel, it's hard to say precisely. However, often main characters in graphic novels are characters that drive the action forward. They could be characters with special abilities or those in a position of power or conflict. Maybe there's a character who is on a quest, and that could be one of the main characters in this graphic novel.
One unique feature could be its art style. The illustrations in Mort graphic novel might have a distinct look that sets it apart from other graphic novels. It could have detailed character designs and unique use of color.
The special thing about Mort animated horror stories is the animation itself. It can make the horror more vivid and immersive. The characters can be designed in very creative ways, with strange features that add to the horror factor.