What are some interesting plot ideas for a Harry Potter OC harem fanfiction?

One possible plot idea could be Harry having to balance his relationships with multiple characters from different houses while also dealing with the Dark Lord's threats. For example, he might form a bond with a Gryffindor girl who is brave and adventurous, a Ravenclaw who helps him with his studies and strategic planning against Voldemort, and a Hufflepuff who offers him emotional support during tough times.

Maybe the Infinity Stones are scattered across the Harry Potter universe. The Avengers have to team up with Harry Potter and his friends to retrieve them. During this adventure, a love triangle or rather a harem - like situation develops. For example, Harry Potter could find himself in the middle of a relationship with Pepper Potts and Ginny Weasley. They would all need to work together to stop a new dark force that is attracted to the power of the Stones.

One idea could be that Harry Potter is transported to a different magical realm where he encounters characters from other stories in a harem - like situation. For example, he might meet characters from 'Lord of the Rings' and they all have to work together to face a new dark threat. Another could be that Harry's magic somehow combines with the powers of characters from a different anime - based magical world, and in the process, a harem of powerful female characters forms around him as they are intrigued by his unique magic.

Maybe the plot could revolve around a wizard who has a special ability to communicate with all magical creatures. As a result, different creatures from the Harry Potter universe, like centaurs, veelas, and house - elves, are attracted to him and form a harem. They then assist him in a quest to find a lost magical artifact that has the power to restore balance to the wizarding world.

Maybe a character who has traits of both Harry Potter's courage and the Sekirei's loyalty is born. This character is then sought after by different factions in both universes. In the story, they could form a harem of characters from both worlds, each bringing their own unique abilities and personalities to the group. For instance, a Sekirei with the power of flight and a Hogwarts student who is excellent at potions could be part of the harem.

In a 'harry potter and marvel harem fanfiction', it could be that a powerful magical object from the Potter universe is lost in the Marvel universe. A group of Marvel heroes and some Harry Potter characters team up to find it. During the adventure, the male Potter characters develop relationships with the female Marvel characters, resulting in a harem - centered plot.

One idea could be Harry forming a study group that gradually turns into a close - knit 'harem' of friends with different magical abilities. They could go on adventures outside of Hogwarts together, exploring hidden magical places and solving mysteries that the school staff doesn't even know about.

One idea could be that Harry Potter and some of his friends are transported to the DC universe and they have to team up with superheroes to fight a common enemy. Along the way, they form a unique bond with the DC characters, creating a harem - like group where everyone has different skills and personalities that complement each other.

Another plot could be that the OC is an outcast in the wizarding world due to their unorthodox magical abilities. They see Harry as a kindred spirit. When they adopt him, they take him on a journey to discover the true nature of magic, which is different from what is taught at Hogwarts. This could involve exploring hidden magical realms and learning from magical creatures that are not well - known in the wizarding community.

Well, a great plot idea could be that the mermaid OC has the power to communicate with magical creatures that live in the lake and around Hogwarts. When some strange and dangerous creatures start to act up, she warns Harry Potter. They then team up to figure out what is causing the creatures to behave this way. Maybe it has something to do with a dark spell cast by Voldemort's followers. Or perhaps the mermaid OC falls in love with a Hogwarts student, and they have to face the challenges of a relationship between a mermaid and a human - like in the classic mermaid tales, but with a Harry Potter twist.