When Snape sees Lily and James, his character development can be quite nuanced. He might see their love as something pure and beautiful that he can't have. This could make him more self - loathing at first. But then, he could start to analyze his own actions. He might think about how his association with the Death Eaters and his often - cruel behavior towards others has cost him Lily. This self - reflection could lead to a transformation. He could start to distance himself from the Dark Arts and try to redeem himself in Lily's eyes. His journey might involve him trying to protect Lily and James from the dangers he's involved in, even if they don't know about it. This would show a more heroic side of Snape that was born out of his pain of seeing them together.
In many fanfictions, when Snape sees Lily and James, it's a turning point for his character. He could see their relationship as a sign of his own inadequacy, which might initially make him more vengeful. However, as time passes, he might come to understand that his actions are driving Lily further away. This realization could lead to a more complex Snape. He might struggle with his feelings, trying to balance his love for Lily with his dislike for James. Eventually, he might grow to accept their relationship, but still hold a special place in his heart for Lily. This new - found acceptance could make him more empathetic towards others in the long run.
It would strain their relationship even more. Snape's love for Lily was already on shaky ground due to their different paths. Seeing her with James would make him feel like she has completely chosen the other side, and he might start to resent her a bit.
If Snape walks in on Lily and James in fanfiction, his character could develop in a more bitter and vengeful way. The sight of Lily with James would be like a dagger to his heart, and he might be driven further towards the dark side. He could start to plot more maliciously against James, using his skills in potions and dark magic to his advantage.
Snape's view of James might not change much at first. He has such deep - seated hatred for James due to their past. But if the fanfiction shows James in a more positive or sympathetic light, he may start to question his long - held beliefs about him, just a little bit.
Often, his jealousy is manifested in his actions towards James. He might try to outdo James in academic or magical feats, all because he wants to prove that he is better than James, especially in Lily's eyes. And when it comes to Lily, he may be secretly longing for her attention while trying to hide his feelings because he knows she is with James.
It could make Snape more bitter. Since he lost Lily to James, he might become even more withdrawn and focused on his own studies or other solitary pursuits. This could further isolate him from others and fuel his resentment towards James and his group.
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.
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 many fanfictions, Snape's jealousy of James and Lily can be deeply rooted in his unrequited love for Lily. Snape had a complex relationship with Lily from their childhood. He loved her deeply, but she fell in love with James. This led to his intense jealousy. His envy towards James was not just about Lily's love, but also about James' popularity and charm which Snape felt he lacked.
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.
He might be filled with intense jealousy and pain. Snape has deep feelings for Lily, so seeing her with James would be like a dagger to his heart. He could feel a mix of anger towards James and self - loathing for not being the one with Lily.