Another common theme is growth. The characters of Willow and Kennedy often grow and change within the fanfictions. They might face challenges that make them stronger as individuals and as a couple.
Love is a very common theme. Most fanfictions focus on the relationship between Willow and Kennedy, whether it's a new love or a long - standing one.
Some fanfictions might focus on their relationship development. For example, how they deal with jealousy or misunderstandings in their relationship. This can add a lot of drama and emotion to the story. Another interesting plot could be them having to team up with old enemies in order to save their friends or the world. It creates a complex situation where they have to put aside their differences and work with people they don't trust, all while strengthening their own relationship.
One common theme is the struggle between good and evil. Since Willow was originally a good witch, as a vampire, she often battles her new vampire nature which is associated with evil. Another theme is redemption. Many fanfictions explore whether Vampire Willow can be redeemed and return to her former self or at least find a new moral path. Power is also a theme, as being a vampire gives her new powers and she has to learn to control and use them.
One common theme is her struggle with power. Given her powerful magic, many fanfictions explore how she controls and uses it. For example, some stories show her learning to master her powers without being corrupted by them.
A common theme is the idea of protection. The angel often takes on the role of protecting the willow, whether it's from dark forces or from the encroachment of a human world that doesn't understand its magic. Another theme is the connection between the spiritual (the angel) and the natural (the willow). It shows how they can interact and influence each other in a fictional universe.
One common theme is the exploration of their unique relationship. Given their different natures, fanfictions often explore how they come to terms with each other. Another theme is power dynamics. Willow has her magic and Spike has his vampiric powers, and stories often play around with how these powers interact.
One common theme is the exploration of their unfulfilled relationship. In the original series, they had a bit of an interesting dynamic that fanfiction often expands on romantically.
Friendship is a very common theme. Buffy and Willow have a strong bond in the series, and fanfictions often explore the depths of that friendship, how they rely on each other in tough times.
Love is a very common theme. Since they have a strong relationship in the original work, fanfictions often expand on their romantic love, showing different aspects of it.
Love is also a common theme. It could be her unrequited love for Tara that led her to become Dark Willow in the first place, or new relationships she forms in the fanfiction. Also, the theme of self - discovery. As she battles with her dark side, she often discovers new aspects of herself.
Fanfiction.net is also a great place to look for willow and kennedy fanfiction. There are many different genres and styles of stories written by various authors. Just make sure to use the right search terms to narrow down your results.