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.
Another theme is their struggle with their own natures. Willow with her magic and Angel with his vampire - with - a - soul situation. Fanfictions might show how they support each other through these internal battles.
There's also the theme of redemption. Angel is always on a path of redemption, and Willow has her own moments of needing to make amends. Fanfiction can explore how they help each other in this regard, perhaps with Willow using her magic to help Angel in some way, and Angel guiding Willow through her moral dilemmas.
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.
A lot of non - adult Willow and Angel fan fictions also focus on mystery - solving. They are both involved in the supernatural world, so they might team up to solve a mystery that involves vampires, witches, or other creatures. This makes for an exciting and engaging plot. And sometimes, there's a theme of self - discovery. They both have complex identities and the stories can explore how they come to understand themselves better through their interactions with each other.
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.
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.
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.
A great Willow Angel fanfiction often has well - developed characters. The writer should stay true to the personalities of Willow and Angel from the original series while also adding new depth to them. For example, exploring Willow's growth in magic in relation to Angel's vampiric nature.
Another possible theme is transformation. Perhaps in these fanfics, Blue Willow and Angel undergo some sort of transformation, either physically or in their personalities. This could be related to the influence of the Black Cat or other elements within the story world of 'Black Cat by Tisienne'.
One common theme is the exploration of their relationship dynamics. Since they might have different personalities, fanfictions often delve into how they interact, argue, and make up.