There are some. Often, these fanfictions explore the idea of a character from either the 'Harry Potter' or 'Buffy' universe achieving the status of Master of Death. For example, a story might have Buffy being transported to the 'Harry Potter' world and having to deal with the Deathly Hallows, or vice versa. Some are really well - written and offer unique takes on the crossover, but you might have to dig a bit to find the best ones. They can be found on various fanfiction platforms like Archive of Our Own as well.
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.
One common theme is the exploration of power. Since the 'Master of Death' concept involves a great deal of power, it's often about how the characters handle it. Another theme is crossover elements, like mixing the magic from 'Harry Potter' with the supernatural fighting in 'Buffy'.
The love story between Buffy and Spike is quite fascinating. Spike, a vampire, was initially a foe to Buffy, the vampire slayer. But love has a strange way of working. Their relationship developed through various interactions. There were times when they fought side by side against common enemies, and these experiences brought them closer. Spike's love for Buffy was so intense that it changed him in many ways. Buffy also had to grapple with her feelings for him, as it went against her instincts as a slayer to love a vampire.
Not really. While there might be a few 'Buffy Suicide Fanfic' out there, they are not common. The Buffyverse is known for its action, magic, and complex characters. Most fanfic writers are interested in expanding on these elements rather than delving into such a distressing and controversial topic. Also, many fanfic communities have rules against writing about topics like suicide in a way that could be harmful or triggering.
At first, it could be a bit rocky. Bruce is used to his own way of doing things and Buffy has her own independent streak. But they would gradually learn to respect each other. Bruce might be impressed by Buffy's combat skills and her ability to handle the supernatural. Buffy, on the other hand, could learn a lot from Bruce's strategic thinking.
Buffy began as a television show and only later was adapted into comics. So, it wasn't a comic initially. The TV series gained popularity before the comic adaptations came out.
Buffy's relationship with Spike in the comics varies. Sometimes they have significant interactions and may even be romantically involved, but it's not a constant throughout all the comic series.