The blind OC could be on a quest to find a cure for their blindness, believing that there is a magical object or spell that can restore their sight. Along the way, they meet various characters who either help or hinder them. They might encounter a dark wizard who wants to use their unique abilities for his own evil purposes. This forces the OC to make difficult choices and grow as a character while also exploring different parts of the wizarding world.
A great plot idea is that the blind OC is a seer. Since they can't rely on normal vision, their prophetic visions are different from Trelawney's. They start having visions that are crucial for the survival of the wizarding world. However, the Ministry of Magic is skeptical because of their blindness. So, the OC has to convince Harry and his friends to trust them and act on their visions. This creates a story full of tension and adventure.
A possible plot is that the Gaunt OC is an outcast within the family due to their different views on magic. They believe in a more inclusive form of magic that accepts all wizards and witches regardless of blood purity. So, they run away from the Gaunt family and end up at Hogwarts. There, they face discrimination from some Slytherins who know of their family name, but they find friends among the other houses and together they try to change the perception of blood purity at Hogwarts.
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.
One idea could be a male oc who is a transfer student from a different wizarding school. He has unique magical abilities that are rare in Hogwarts, like the ability to communicate with magical creatures on a deeper level. This could lead to him helping Hagrid with some of the more dangerous creatures and getting into all sorts of adventures around the Forbidden Forest.
One idea could be that the OC is a transfer student from a far - off magic school. The harem could consist of characters from different houses. For example, Hermione could be attracted to the OC's vast knowledge of ancient magic that he or she learned from their original school. Ginny might be drawn to the OC's brave and adventurous spirit, similar to Harry's. And Luna could be interested in the OC's unique view of the magical world, which is different from Hogwarts' norm.
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.
One idea could be that the OC is a foreign exchange student who has unique magical abilities unknown to Hogwarts. They could help Harry in the Triwizard Tournament tasks in unexpected ways, like using ancient spells from their home country.
Well, an interesting plot for a Harry Potter oc fanfic could be an OC who discovers a hidden chamber in Hogwarts that has been sealed off for centuries. This chamber could hold the key to a powerful magic that could change the balance between good and evil in the wizarding world. Or perhaps an OC who has the power to see the future in their dreams but doesn't understand it at first, and they keep having these strange dreams that seem to be related to Voldemort's return. They then have to figure out what it all means and how to use this power to help their friends.
A male OC could be a Muggle - born who discovers he has a special power that the wizarding world has never seen before. He could be hunted by dark forces who want to use his power for evil, and he has to rely on his new friends at Hogwarts to protect him. Another idea is that the male OC is a transfer student from a foreign wizarding school. He brings with him different magical techniques and cultural beliefs, which causes a stir at Hogwarts as students and teachers alike are both intrigued and a bit skeptical.
Well, perhaps the OC is reincarnated into a family that has a long - standing feud with one of the major wizarding families in the Harry Potter world. But instead of continuing the feud, the OC tries to make peace. They could also be reincarnated with a knowledge of some lost or forgotten magic that could help in the fight against Voldemort. For instance, they might know a powerful protection spell that was lost centuries ago. Their presence could then change the power dynamics in the fight against the Dark Lord.
One idea could be that the Witch OC is a transfer student from a far - off magical school. She has unique magical abilities that are rare in Hogwarts, like the ability to communicate with magical creatures on a deeper level. This could lead to her helping Hagrid with some of his more difficult creature - related tasks and catching the attention of Harry and his friends.