In a fanfic, Harry could be developed by showing how he copes with having his mother back in his life. He might have mixed feelings of joy and confusion. Lily could be developed by depicting her reaction to the modern wizarding world that Harry is a part of. She could be both amazed and a bit critical of some of the changes. This would give depth to their characters as they interact and adapt to each other.
Perhaps Sirius Black could also be involved. Sirius was Harry's godfather and was very much a part of Harry's life. His presence could add some interesting dynamics, like he could be the one who stumbles upon the magic that makes the meeting possible and then has to deal with the implications of Harry meeting his mother.
First, it's crucial to respect the source material and the characters. When writing a 'Harry and Lily Evans' fanfic, start with a clear plot in mind. Outline how their relationship will develop. But keep in mind that if it's a lemon fanfic, it should be written in a tasteful way. Avoid going overboard with explicit details.
One great fanfic could be 'Harry and Lily's Enchanted Bond'. In this story, Lily, being a fairy, might use her magical fairy abilities to help Harry in his adventures at Hogwarts. It could add a whole new dimension to the wizarding world as we know it.
One possible fanfic could be about Lily Luna Potter discovering a magical lemon tree in the Hogwarts grounds. The lemon might have special properties that are tied to her family's legacy. For example, it could produce lemons that when squeezed, release a potion - like liquid that can cure common wizarding ailments. She then has to protect the tree from those who would use its power for dark purposes.
One common theme could be family bonds. Since Harry and Lily are related, exploring that connection in different ways is often seen. Another might be the idea of lost opportunities or what - if scenarios regarding their relationship.
One idea could be a story where Harry discovers a hidden diary written by Lily. Luna, with her unique insights, helps Harry decipher the secrets within it. And the 'lemon' could be a magical lemon tree that has special powers related to protecting the secrets. For example, it can only be accessed by those with pure hearts, like Harry, and Luna uses her knowledge of magical plants to figure out how to make the lemon tree reveal more about Lily's past.
Another theme could be the exploration of magic. In many fanfics, the magic in the Harry Potter world is a central element. In 'lily harry lemon fanfic', it could be about how Lily's magic might have passed on to Harry in unique ways or how they both use magic in different situations together. Also, there could be themes of sacrifice, as Lily sacrificed herself for Harry in the original story, and fanfic might expand on that concept in relation to their relationship.
In some fanfics, it could be due to a threat she believes she can't protect Harry from. Maybe she thinks that by leaving him, the dark forces won't target him as much.
The lemon could be a magical object that holds a connection to Lily's past. For instance, it could be a gift from Lily to Harry that he discovers later. Luna could play the role of the guide, using her wisdom and strange knowledge to help Harry understand the significance of the lemon. They could go on a quest to find out more about Lily's connection to the lemon, which might lead them to uncover secrets about Lily's family or her hidden powers.
Perhaps in this fanfic, Harry has been influenced by dark magic or some evil entity. This external influence could distort his perception of Lily and turn his normal feelings for her into hatred. Dark magic has the power to corrupt one's mind and change relationships in unexpected ways.