One idea could be that a Succubus is a new kind of magical creature discovered in the Forbidden Forest. The Hogwarts students and professors have to figure out how to deal with it, whether it's a threat or not. Another could be a Succubus who has lost her powers and comes to Hogwarts seeking help to regain them in a non - sexual way, like learning about different kinds of magic.
One idea could be that a centaur saves Harry from a dangerous creature in the Forbidden Forest and then they form a bond. The centaur could teach Harry about the ancient magic that the centaurs possess. Another plot could be a centaur acting as a guide for Harry during his search for a rare magical herb that only grows in centaur - protected areas. They would have to work together to overcome various obstacles.
Yes, there are likely some out there. While the 'x' often implies a crossover or pairing in fanfiction, not all writers will include inappropriate content. You can search on fanfiction - specific websites and filter by rating or genre to find more family - friendly versions of such crossovers.
One idea could be that a female Harry Potter discovers a time - travel spell and goes back in time to try and prevent Voldemort from ever becoming evil. She could try to befriend him as a child, show him kindness, and change the course of history. This would create a very different wizarding world and an interesting dynamic between the two characters.
One idea could be that Wanda Maximoff is transported to the Harry Potter universe. She could use her powers to help Harry and his friends during the Battle of Hogwarts. Her ability to manipulate energy and reality could give them an edge against Voldemort and his Death Eaters.
Perhaps the catgirl is an emissary from a magical cat kingdom that has a connection to the Forbidden Forest. She comes to Hogwarts to seek help because the forest is being corrupted by a dark force. Harry and his friends join her on a journey into the forest to find the source of the corruption and cleanse it. Along the way, they discover new magical creatures and spells related to the catgirl's magical heritage.
A possible plot could be that the female hippogriff is the key to solving a mystery in Hogwarts. Harry notices some strange behavior from the hippogriff and starts to investigate. He finds out that the hippogriff has a connection to an ancient magic that is hidden somewhere in the school. So, Harry and his friends embark on a journey to uncover the mystery with the hippogriff as their guide. Or perhaps the female hippogriff is a messenger from a far - off magical land, and Harry has to help it deliver its message to the right people in the wizarding world, which involves a lot of adventures and encounters with different magical beings.
One idea could be that fem Harry Potter and Bill Weasley team up to explore an ancient and forgotten part of the wizarding world. They discover new spells and magical creatures along the way and form a strong friendship based on their shared adventures.
A plot could also be where Naruto is wrongly accused of being a succubus - like being a danger to the village because of some strange powers he has. Kushina, even though she has passed away, appears to Naruto in his mind or as a spirit guide. She gives him the strength and wisdom to prove his innocence and show that his powers can be used for good, rather than being seen as something evil like a succubus.
One plot idea could be Tonks training Harry in some unique magical skills that she has learned from her time in the Order. This could involve her teaching him how to use certain spells in a more creative way or how to better understand the magic of disguise, given her Metamorphmagus abilities. Another idea is that Tonks and Harry go on a secret mission together to find a lost magical artifact that could turn the tide in the war against Voldemort. Along the way, they face various challenges and have to rely on each other's strengths.
Another idea is that the female vampire is actually an ancient protector of a powerful magical artifact. The artifact has been lost for centuries, and its location is somehow linked to Hogwarts. Harry Potter and his friends cross paths with the female vampire while on a quest to find the artifact. At first, they are wary of each other, but they soon realize that they need to work together. The vampire's unique abilities, such as enhanced senses and strength, help them in their search, and in return, Harry and his friends help her protect the artifact from those who would use it for evil.