He could meet the ghosts of his ancestors. These ghosts might offer him some advice or reveal some family secrets that could help him in his future adventures.
Perhaps he'll meet a reclusive wizard who has been living near the graveyard in seclusion. This wizard could be extremely powerful and might initially be hostile to Harry but later become an ally. Another possibility is that he meets some other Hogwarts students who are also there for some secret exploration and they team up.
In the graveyard, Harry might encounter a lost soul that is trapped there. This lost soul could be of a former wizard who was wronged in the past. Harry, with his kind heart, might try to help the soul find peace. Or he could meet some magical creatures that are native to graveyards, like a spectral hound or a banshee, and he has to figure out how to deal with them.
He could meet a young and talented French wizard who becomes his guide in France. This wizard might show Harry all the hidden magical spots in France.
He could meet a Canadian wizard named Oliver who is an expert in ice magic. Oliver could teach Harry how to use magic in the cold Canadian climate.
He could meet other young wizards and witches who are also on vacation. They might be from different parts of the wizarding world. For instance, a group of wizards from a far - off land with unique magical traditions.
Perhaps Harry will meet some reclusive or mysterious figures in the new school. They could be ancient wizards who have been in hiding for years, or strange creatures that are able to communicate with humans. These encounters would surely add more excitement and mystery to Harry's time at the different school. He may also come across some students who have a different view on the wizarding war and Voldemort, which would make for interesting conversations and potential conflicts.
He could meet the Joker. The Joker is a well - known character in Arkham Asylum, and his chaotic nature would surely create an interesting interaction with Harry.
In this fanfiction, Harry might meet students from various backgrounds. There could be students from far - off magical lands who have their own unique cultures and magic. He could also run into some Beubaxtons alumni who come back to visit and they might share some interesting stories or give him some advice on how to make the most of his time at Beubaxtons.
He could meet his future self. This would be a very interesting encounter as he could learn from his future self about what he has accomplished and what mistakes he should avoid. He might also meet the future generations of his family, like his grandchildren or great - grandchildren.
Perhaps Harry will run into an old wizard who has been in the hospital for a long time. This wizard has a lot of stories about the old days of the wizarding world and gives Harry some valuable advice.
Sakura might be one of the characters. She has her own set of skills in the medical and combat fields. Meeting Harry could lead to exchanges of knowledge about different forms of healing and combat magic.
He could meet the main characters from Death City. For example, Maka Albarn and Soul Eater Evans. They could be initially cautious around Harry but then become friends as they realize his good intentions.