Harry's gang could include some of the characters we don't see much of in the original books. For example, the house - elves. Dobby was already very loyal to Harry. Maybe he could convince other house - elves to help out in a more active way. There could also be some of the older students who dropped out of Hogwarts for various reasons but still have a lot of magical knowledge. And of course, Hagrid could be an honorary member, providing his vast knowledge of magical creatures and his big - hearted support for Harry and the gang.
In a 'Harry Potter Runs a Gang' fanfiction, Harry might run a gang that focuses on protecting the underprivileged in the wizarding world. His leadership would be based on his experiences with Voldemort. He'd probably have some rules that are different from the traditional Hogwarts rules. For example, they might operate outside the school grounds more often to help those who are being bullied by dark wizards. They could use magic in creative ways to outwit their opponents.
One possible goal could be to protect the wizarding world from new and unknown threats. Since Harry has always been a defender, his gang would follow suit. Another goal might be to promote unity among different wizarding groups. In the original series, there were some divides, but as a leader, Harry could aim to bridge those gaps through his gang.
There's a fanfic titled 'Escape and Rediscovery'. Female Harry Potter runs away after feeling betrayed by some of her so - called friends at Hogwarts. She travels far and wide, learning different forms of magic from various sources. It has a really unique plot and great character development.
Perhaps he'll meet a mysterious old wizard who lives in a secluded temple in the mountains. This wizard could be a master of ancient Japanese magic and could teach Harry about the spiritual side of magic that is deeply ingrained in Japanese culture. Harry might also meet a group of young Japanese witches who are training to become magical healers. They could share their knowledge of Japanese magical plants and how to use them for healing, which would be very different from the healing methods Harry learned at Hogwarts.
One possible plot could be that Harry, having known the hardships of being an orphan himself, decides to open an orphanage at Hogwarts. He uses magic to create a warm and safe environment for the orphans. He teaches them magic, not just spells but also the values of friendship and courage, much like Dumbledore did for him.
The storyline could involve Harry using his experiences as an orphan to create a warm and magical place for the kids. He might teach them magic, share his tales of Hogwarts, and help them discover their own magical abilities. Maybe he'd also have some of his old friends like Hermione and Ron visit and help out with the kids' education.
One idea could be that Fem Harry Potter runs away because she feels suffocated by the expectations placed on her at Hogwarts. She might head to the Forbidden Forest where she discovers a hidden magical community that has been living in seclusion. This new community could teach her different forms of magic that she was never exposed to at school.
Perhaps it's a girl orphan who was found wandering near the Forbidden Forest. She has no memory of her past but shows great potential in potions. Harry feels a connection to her because she seems so lost, just like he once was. So, he decides to take her in as the first orphan in his new orphanage.