The main characters would be Harry and Cho. Harry is the one making the big move of buying the contract. Cho, on the other hand, is the one whose contract is being bought. But we could also see characters like Luna Lovegood popping up. Luna could offer some really out - of - the - box thinking on why Harry did what he did and how Cho should react. And of course, Dumbledore might also play a role, perhaps guiding Harry from the sidelines or having some prior knowledge about the contract situation.
The main characters are obviously Harry Potter and Cho Chang. Harry is the famous wizard who defeated Voldemort, and Cho is his classmate who he had a bit of a romantic history with in the original books.
Perhaps in this fanfiction, Harry bought Cho's contract to get closer to her. He might have feelings for her still and this is his rather strange way of showing it. Then they could start to work together on something, like fighting against a new threat in the wizarding world. As they spend time together due to the contract, their relationship could either rekindle or they could just become really good friends.
Hermione Granger could be one of the characters. Since she is Harry's close friend, it would be interesting to see how she fits into the harem dynamic, whether she's supportive or has some mixed feelings about it.
For sure, Harry and Tonks would interact with Remus Lupin. Since Tonks had feelings for Lupin before, it would create a very complex situation. The Weasley family could also be part of their interactions. Molly Weasley might have strong opinions on this marriage contract. And then there are the other members of the Order of the Phoenix. They would be involved as they are all fighting against the dark forces and this marriage contract could have implications for their cause.
Harry is the most important character interacting with Yandere Cho. But we can't forget about Luna Lovegood. Luna might notice Cho's abnormal behavior and try to warn Harry. Also, Cedric Diggory's memory could play a role. Since Cho was Cedric's girlfriend before, his memory might haunt her and fuel her yandere tendencies, and this could be noticed by characters like Harry when they interact with her.
It could be about Harry buying something for Cho as a gift. Maybe it's a special item related to their time at Hogwarts, like a Quidditch souvenir.
Obviously, Harry Potter himself would be a main character. Since it's about a betrothal contract related to him. And probably the person he is betrothed to, whoever that may be in the fanfic's universe.
Obviously, Harry would be the main character. Since it's about him being a Saiyan. And I think some of his friends from the Harry Potter series might also be important characters, like Hermione and Ron. They could react to Harry's new Saiyan identity in different ways.
Obviously, Harry would be the main character as the title implies. But other characters like Hermione and Ron would also be important. They could either be part of Harry's regime, reluctantly or wholeheartedly, or they could be part of the resistance against his dictatorship.
Obviously, Harry would be the main character. Since it's about him being a playboy, he would be at the center of the story. There might also be his friends like Ron and Hermione. They could play important roles in either supporting or trying to change Harry's playboy ways.