Yes. Buffy the Vampire Slayer has a significant presence in the comic book world. Many fans enjoy the comic book versions for their unique takes and additional adventures of the characters.
Love and relationships are common themes. Many fanfictions explore Buffy's love for Angel or Spike further. Another theme is the struggle between good and evil. Since the show is about slaying vampires, this is often explored in new ways in fanfiction. And there's also the theme of self - discovery as the characters, especially Buffy, are constantly evolving.
The ending of Buffy the Vampire Slayer in the comics is quite complex and involves various plot twists. Buffy ultimately faces a major showdown with powerful foes and emerges victorious, but there are sacrifices and changes along the way.
One way the 'Master of Death' could be incorporated in such fanfiction is through the resurrection aspect. In Buffy, resurrection is a big theme, and Harry, as the Master of Death, could have a different take on it. Maybe he could use his connection to death to bring back characters in a more 'controlled' way compared to the often chaotic resurrections in Buffy. This could lead to new storylines and conflicts, like dealing with the moral implications of such actions and how it affects the balance of the Buffyverse.
Buffy is obviously one of the main characters. She is the vampire slayer, strong and brave yet also dealing with normal teen issues. Then there's Willow, her best friend who is into magic and technology. Xander is also a main character, the funny and loyal friend who often gets into trouble right along with Buffy and Willow.
One common theme is protection. Since Spike is a powerful vampire, many fanfics have him protecting Dawn from various threats in Sunnydale. Another theme is friendship. They often form a unique bond that is different from their relationships with other characters in the show.
Sure. One great Buffy Vampire Slayer fanfiction is 'Chosen'. It delves deeper into the relationships between the characters after the series ended. Another one is 'Slayer's Return' which takes Buffy on a new adventure in a different dimension. There's also 'Faith's Redemption' that focuses on Faith's journey to redemption in an interesting new way.