Tethys could also be a candidate. Percy as the son of Tethys could have a connection to the oceans in a different way than his Poseidon - related powers. Maybe he could communicate with sea creatures on a deeper level or have the ability to control the tides in a more powerful way.
Love against all odds is a very prevalent theme. Given that Percy and the Titaness are not an ordinary couple, they face a lot of opposition. Their love has to overcome things like prejudice from others, differences in their upbringing, and the political implications of their relationship in the fictional world. Also, the theme of self - discovery is often there. Through their relationship, both Percy and the Titaness learn more about themselves.
One popular 'Percy x Titaness fanfic' could be 'The Titaness's Choice'. It often explores the unique relationship between Percy and the Titaness in a world full of magic and adventure. The author does a great job of developing their characters and the plot is filled with twists and turns.
One idea could be Percy exploring his new powers that come from being the son of a Titaness. He might discover abilities that are different from his normal demigod powers and have to learn to control them quickly. For example, he could have the power to manipulate time on a small scale, like slowing it down in a battle to gain an advantage.
One great 'Percy x Nico x Jason' fanfiction is 'The Three Heroes' Journey'. It beautifully weaves their characters together, exploring their friendships and the challenges they face as a trio. The author does an amazing job of capturing their individual personalities. Percy's loyalty, Nico's mystery, and Jason's leadership all shine through in the story.
The theme of family also comes up. Percy has a complex family situation, and Hestia can be seen as a mother figure in some fanfictions. This relationship can explore what it means to have a stable and loving family member in the chaotic world of Percy Jackson. It can also show how Percy responds to this new kind of family connection, perhaps growing and maturing as a result of Hestia's influence.
A simple yet effective title could be 'Percy x OC: A Fan - Created Story'. It clearly states what the fanfiction is about, that it involves Percy and an original character, and that it's a story created by a fan.
In this fanfiction, the 'yandere' aspect of Artemis likely adds a dark and obsessive twist to her relationship with Percy. Yandere characters are often extremely possessive. Artemis, being a goddess in the Percy Jackson universe, already has a complex character. Her being yandere towards Percy could mean she'd go to extreme lengths to keep him for herself. It might lead to her clashing with other characters who are close to Percy. This could also bring out new sides of Percy as he deals with such intense and perhaps dangerous affection.
In Percy x Zoe fanfiction, often there is a strong focus on their relationship dynamic. It could be a slow - burn relationship, with lots of tension and anticipation. For example, they might start as comrades and gradually develop deeper feelings.
A popular 'Percy x Annabeth Fanfiction' is 'Under the Stars'. In this story, the author takes them on a journey away from Camp Half - Blood. The descriptions of their interactions and the development of their relationship are beautifully done. There are also some really cool action scenes that add to the overall excitement of the story. It's a must - read for fans of the couple.