Perhaps Harry Potter uses the life debts to reform the wizarding world. He calls in these debts to get support for new laws and regulations that would benefit the marginalized groups in the wizarding community. He could ask those indebted to him to vote for him in the Wizengamot or help him spread awareness about his new ideas.
Obviously, Harry Potter himself is the central character. Others could include Ron and Hermione, who have been by his side through many life - threatening situations and might also be in debt to him in some way, for example, if Harry saved them from a particular dark spell during a battle. Also, Neville Longbottom could be involved as Harry saved him from Voldemort during the Battle of Hogwarts.
Another plot could involve Harry calling in life debts from multiple characters at once to mount a large - scale defense against a new threat. These characters, bound by their life debts, would have to put aside their differences and work together. This would showcase Harry's strategic thinking and also explore the complex relationships between different characters in the fanfiction world.
In this fanfiction, perhaps Harry Potter has reached a point where he realizes he's done a lot for others in the wizarding community. So, he starts calling in all the debts. It could involve his friends like Ron and Hermione, who he might call upon for special assistance. It might also include other characters he's helped over the years. This could lead to all sorts of interesting plot developments, such as new alliances being formed or old secrets being revealed as people try to fulfill their debts to Harry.
There could also be characters like Dumbledore, even if in spirit or through memories. His wisdom might have influenced Harry's understanding of life debts, and his past actions could be related to debts that Harry is now calling in. And then there are the characters who owe Harry their lives. This could include Neville, who Harry has saved on multiple occasions, and their relationship could be further explored in the context of the life debt.
One possible plotline could be Harry using life debts to form powerful alliances. For example, he might call in a life debt from a powerful wizard who then helps him in a battle against dark forces. Another could be that Harry uses a life debt to gain access to some long - hidden knowledge or a secret place.
One possible plot is that Harry calls in the life debt to gain an ally in a dangerous magical tournament. In the lemon fanfiction, this new ally, bound by the life debt, becomes very close to Harry. They start to have feelings for each other, and there are some sensual scenes between them during their training for the tournament. The story could then revolve around their relationship development while also showing how the life debt affects the events of the tournament.
Obviously, Harry Potter would be one of the main characters. He is the one calling in the life debts. There might also be the people who owe him life debts, like some of his friends who he has saved in the past, or even some unexpected characters from the wizarding world.
Obviously, Harry Potter would be the main character as the title implies. But his friends like Ron Weasley and Hermione Granger are also very likely to be important characters. Since they've been through so much with Harry, they might be among those who are called upon to pay their debts, or they could help Harry in the process of calling in debts from others.
I'm not entirely sure what 'dites' means in this context. It could be a misspelling. If we assume it's something made up for a very strange fanfiction idea, it might imply that in this fanfiction, Harry Potter is making some sort of statement about life that involves something lemon - which could be a code for something odd or unique in the fanfiction world.
Another storyline might involve a life debt being passed down through generations. So, a character in the present day Harry Potter world has to deal with a life debt that was incurred by their great - grandfather. This could involve delving into old family secrets, forgotten magic, and trying to understand the context of a debt that is so old but still binding.