Fem Percy might be developed as a strong - willed and independent character. In the context of the lemon fanfiction, her relationship with Hermes could bring out her more vulnerable side. For Hermes, he could be shown as initially aloof but gradually becoming more attached to Fem Percy as the story progresses.
Their relationship could start with mutual respect. Hermes might be impressed by Fem Percy's courage and strength, which are traits he values. As they interact more, perhaps on a quest together, they could develop a friendship. For example, Fem Percy could save Hermes from a tricky situation, and in return, Hermes could offer her some valuable advice or a special gift that aids her in her future adventures.
Hermes might start as a mischievous and curious child. Since Percy is his father, he could inherit some of Percy's determination. As the story progresses, he could learn about loyalty from Percy, especially when dealing with other gods who might not have his best interests at heart.
One plot idea could be that Fem Percy, as a daughter of Poseidon, has some sort of mission that involves Hermes. Maybe she needs to use Hermes' speed and messenger skills to deliver an important message across the realms. Since she is a powerful demigod in her own right, their combined efforts could lead to an adventure full of challenges and discoveries.
Well, perhaps Hermes has been cursed and Fem Percy has to find a way to break the curse. In the process, they get closer and closer, and the lemon aspect comes into play as they share some passionate moments while dealing with the curse's effects on Hermes' emotions and actions.
Well, in some fanfictions, Hermes might be possessive of Percy because Percy could possess certain qualities or powers that Hermes wants to control or have an influence over. Maybe Percy has a unique connection to the world of the gods that Hermes sees as valuable.
In some fanfictions, Hermes interacts with Percy as a mentor. He might offer advice on how to deal with other gods or mythical creatures. For example, he could tell Percy the weaknesses of a particular monster. In other stories, he may be more of an enigma, his actions and words being hard to decipher. Sometimes, Hermes and Percy form an alliance, like when they have to face a common threat together.
Hermes' possessiveness can be shown by his over - protectiveness. He may interfere when other gods or creatures try to harm Percy. In some fanfictions, he might even go as far as to isolate Percy from other demigods or gods to have Percy all to himself. He could also be very jealous if Percy spends time with other powerful beings and show his possessiveness through angry outbursts or manipulative actions.
One common theme is mentorship. Since Hermes is an older god and Percy is a young demigod, often fanfictions explore Hermes taking Percy under his wing in some way.
I recall a fanfic titled 'Mate of Hermes: Harry's New Path'. In this one, the fem Harry Potter discovers her connection with Hermes in an unexpected way. The story is filled with twists and turns as they explore their relationship while dealing with the darker forces at play in the wizarding world. It's a long - read but definitely worth it.