One common theme is redemption. Many fanfics explore how an OC vampire can find redemption in a world full of slayers like Faith. It's about breaking free from the typical vampire - evil stereotype.
In BtVS fanfiction, the concept of Faith being married to Xander by Loki can be a really wild and creative idea. It might involve a lot of magic and chaos since Loki is a trickster god. Maybe Loki has his own reasons for bringing these two characters together, perhaps to disrupt the normal order in the Buffyverse.
There's also 'Faith's Vampire Ally'. In this fanfic, the OC vampire forms an unlikely alliance with Faith. It delves deep into their relationship, exploring how they overcome their differences, which are many considering one is a slayer and the other a vampire. It's full of action and some great character development.
One idea could be a magical competition. They compete to see who can master a new and dangerous spell first. Buffy might use her traditional training and moral compass, while Faith could be more reckless in her approach, which would create a lot of tension.
For Buffy, her friends like Willow and Xander would be likely allies. Willow could use her magic to give Buffy an edge in any magical challenges, and Xander would be there for moral support and to offer his own brand of scrappy help. Giles, too, with his vast knowledge of the supernatural.
Often, Buffy and Faith kiss fanfiction can be a form of wish - fulfillment for fans who see the potential in their relationship. It can show different interpretations of their personalities. For example, a fanfic might show Faith being more vulnerable through the kiss, or Buffy being more open to a different side of herself. This kind of fanfiction also allows for creativity in exploring different settings and scenarios where this kiss takes place.
One great Buffy Faith fanfic is 'Faith's Redemption'. It delves deep into Faith's journey towards redemption. It shows how she overcomes her inner demons and tries to make amends for her past wrongs. The character development is really well - done.
I really like 'The Bond Between Slayers'. It's a fanfiction that focuses on the unspoken connection between Buffy and Faith. It has some great action scenes as well as emotional moments that really bring out the depth of their relationship. There are also some interesting plot twists that keep you hooked throughout.
Love and friendship are common themes as well. Whether it's platonic love between the two of them, or how their relationships with others are affected by their bond. In some fanfics, they learn to truly care for each other through difficult situations, which shows the power of friendship.
One idea could be a story where Buffy and Faith have to go undercover at a high - society event where the latex dress is part of their disguise. They end up having to work together to take down a vampire who is preying on the rich guests.