Perhaps the soulmate tattoo is a key to a hidden magical place. In the fanfiction, the female Harry Potter discovers that her tattoo has a pattern that matches a door in an ancient, forgotten part of Hogwarts. As she gets closer to her soulmate, the tattoo gives off more details about how to unlock the secrets of this place. It might contain powerful spells or artifacts that could change the wizarding world.
Another interesting concept is that the soulmate tattoos change based on the relationship. If the couple is going through a tough time, the tattoo might fade or become distorted, and when they reconcile, it regains its original beauty. It could add a lot of drama and emotion to the fanfiction. Well, you can also have a scenario where the soulmate tattoos are actually a map leading to each other. The lines and symbols on the tattoos gradually make sense as the characters get closer to finding their soulmates.
One interesting fanfiction could be where the soulmate tattoos are magical keys. For example, Harry's tattoo is a key that can only unlock the chamber where his soulmate is hidden. It adds an element of mystery and adventure to the story.
For a character who is very independent like the female Harry Potter in this fanfiction, the soulmate tattoo could initially be a source of conflict. She might resist the idea of being tied to someone through a tattoo. But as she gets to know her soulmate better, she learns to balance her independence with the new connection. Her soulmate, who could be a bit of a people - pleaser, might learn from her to stand up for himself more, especially when it comes to their relationship and how others view it.
One idea could be that the soulmate tattoos appear when they reach a certain age. Hermione's tattoo might be something related to Fred's love for pranks, like a tiny Weasley's Wizard Wheezes logo. And as they discover their tattoos, they initially deny the connection because they see each other more as friends or comrades in the fight against the dark forces. But as time goes on, they start to notice little things about each other that they didn't before, and the tattoo becomes a symbol of their growing bond.
Maybe Harry Potter, as a tattoo artist, is located in a wizarding alley where all kinds of magical beings come for tattoos. He could get a visit from a centaur who wants a tattoo that symbolizes his connection to the forest. Harry would have to figure out how to tattoo the centaur's tough skin. There could also be a plot where Harry's tattoos start to have unforeseen magical effects on the wearers. For instance, a tattoo of a love potion - inspired design makes the wearer fall in love with the first person they see. Harry then has to find a way to reverse the effects while still maintaining his reputation as a tattoo artist.
One interesting idea could be tattoos that represent the Hogwarts houses. For example, a Gryffindor might have a lion tattoo. Another could be tattoos of spells, like the Lumos spell as a glowing wand on the skin. Some fanfictions might also feature tattoos of the Deathly Hallows symbols.
One plot idea could be that Fem Harry Potter travels back in time and meets James Potter. They form an unexpected friendship and she has to navigate the differences between their time periods while also dealing with her own identity in this new situation.
One idea could be that the female Harry Potter, with her magical abilities, has to face the underground threats from the Tremors creatures. Maybe she uses spells to detect their movements underground before they surface. Another could be that she teams up with the local townspeople from the Tremors universe, and she teaches them some basic magic to defend themselves against the giant worms.
One plot idea could be that the fem dragon is a guardian of an ancient wizarding artifact. Harry discovers this and has to team up with the dragon to protect it from dark wizards. Another idea is that the dragon is an outcast in the magical world and Harry befriends it, leading to a story about acceptance and friendship.
One plot idea could be that Fem Harry Potter, with her unique perspective as a female in the wizarding world, becomes a sort of counter - force to Grindelwald's dark plans. Maybe she uses her female intuition and different magical approach to outwit him. For example, she could focus on using protective spells in a more creative way compared to the traditional male - dominated magic in the wizarding world.