Maybe there are other souls that Cisl meets in heaven. These could be historical figures or just ordinary people who had interesting lives. They could share their stories with Cisl, making Cisl's time in heaven more enriching.
There could be angels, like Gabriel or Michael. They might play a role in guiding Cisl through heaven or testing Cisl's worthiness.
Maybe Cisl goes to heaven due to some unexpected circumstances, like sacrificing their own life to save others. Once in heaven, Cisl might be reunited with lost loved ones and have a grand tour of the celestial realms, seeing all the beautiful and magical things there.
Ciel is surely the central figure. However, there could be other characters from the original source material that have also passed on and are in heaven. Additionally, there may be original characters created for the fanfic, such as a special angel who has a particular connection with Ciel. There might also be antagonists in the form of fallen angels or some sort of heavenly bureaucrats who oppose Ciel for some reason.
Akira is the main character for sure. There could also be his family members waiting for him at home, like his parents or siblings.
Maybe there are some villains. For example, an enemy general who is trying to stop Harry from achieving his goals with the tank. There might also be some side characters like a mechanic who helps Harry fix the tank when it breaks down in the middle of his journey.
Ron could also be important. He might be torn between his loyalty to Hogwarts and his friendship with Harry. Eventually, he could choose to leave Hogwarts to be with Harry, bringing his Weasley family charm and his own brand of magic to the group. The Weasley twins might also get involved, providing some much - needed humor and their unique magical inventions.
There could be a kind old healer in Haven who takes Cousland under her wing and helps her during her pregnancy.
There could be other Hogwarts students. For example, Neville could be there, exploring the different plants and herbs that are associated with Beltane. Luna Lovegood might also make an appearance, with her unique perspective on the magical aspects of the festival. And perhaps some local wizards and witches from the area where the Beltane celebration is taking place.
Viktor Krum could be a major character. Since he is from Durmstrang, he might play a role like a mentor or a rival to Harry. Another character could be the headmaster of Durmstrang. He would be important as he sets the rules and tone for the school.
There could be other non - human characters like a wise old wizard who knows about Percy's true nature and tries to guide him. Maybe a shape - shifter who at first seems like an enemy but later becomes an ally.
Well, surely Hinata would be there. As Naruto's wife, she would support him in his role as Uzukage. Maybe Boruto and Himawari would also be involved, learning about their Uzumaki heritage from their father. And there could be some other Uzumaki clan members who have been in hiding and now come out to help Naruto lead the village.