One common theme is unrequited love. Snape's love for Lily is often unreturned in the way he desires, which creates a lot of angst in the stories. For example, in many fanfictions, Lily may be with James while Snape still pines for her.
Another theme is redemption. Snape's actions, especially his role as a double agent, are often explored in relation to his love for Lily. His love is seen as a driving force for his attempts to atone for his past mistakes, like his association with the Death Eaters in some fanfic plots.
The theme of lost opportunities also frequently appears. Fanfictions often explore how different choices they made at Hogwarts, like Snape's choice of friends or Lily's reaction to Snape's actions, could have led to a different relationship between them. For instance, if Snape had been more open about his true self, would Lily have fallen for him instead of James? This question is often at the heart of many Lily x Snape fanfictions, leading to a lot of alternate - universe - type stories.
In lily and snape fanfiction, the theme of lost love is very prevalent. Their relationship was cut short, and this sense of loss is often explored. The theme of inner turmoil is also common. Snape's internal struggle between his love for Lily and his association with the Death Eaters is a key element. Additionally, the theme of hope, that perhaps in some way their relationship could have been different, is often seen.
One common theme is unrequited love. Snape's love for Lily was often one - sided, and many fanfictions explore this aspect in depth.
Regret is a big theme too. Snape is often portrayed as full of regret for not being able to fully express his love to Lily before it was too late. And of course, the theme of forbidden love. Their different houses and Snape's association with the Dark Arts in some ways make their relationship seem forbidden, and the kiss is a symbol of breaking those barriers in the fanfiction.
One common theme is unrequited love. Snape has deep feelings for Lily, but she often just sees him as a friend. Another theme is the power of friendship in their early years. They start off as friends and that friendship is a big part of their story in these fanfictions.
Love and jealousy are very common themes. Snape's unrequited love for Lily while she is with James creates a lot of jealousy. It often drives the plot as Snape's actions are influenced by his feelings.
In lily potter and snape fanfiction, the theme of missed opportunities is quite common. They had so many moments in their lives where things could have been different between them. Also, the theme of hidden feelings is there. Snape hid his true feelings for Lily for a long time, and fanfictions like to explore how that affected their relationship. Another common theme is the power of love, how Snape's love for Lily had such a huge impact on his life and actions, despite all the odds.
Unrequited love is a very common theme. Snape's love for Lily that was never fully reciprocated is often explored in depth. It adds a lot of emotional depth to the stories.
One common theme could be the conflicted emotions of Snape. Given his complex relationship with Lily, his reaction to her pregnancy might be a central aspect, like dealing with his unrequited love in a new context.
The theme of second chances is also prevalent. It's like they get a second chance at a relationship that didn't work out in the original story. Also, the theme of family. They create a new family unit, and the fanfictions explore how they deal with raising children, dealing with in - laws in the wizarding world, and all the family - related issues.
Guilt and redemption can be a theme too. Snape's actions were often driven by his love for Lily and his guilt over her death. Fanfictions may expand on this, showing how he tries to make up for it in different ways. Also, the theme of loyalty - Snape's loyalty to Lily even after her death is a powerful concept that fanfictions often explore, sometimes by creating scenarios where Lily somehow comes back or is still present in a way that tests Snape's loyalty.