Well, in the fanfiction, the development of the plot could be centered around the trivot being a source of great power. Harry could be seen as the chosen one to possess it. However, this would attract the attention of dark wizards. Harry would then have to form new alliances, like with some outcast wizards or magical creatures. He would need to learn how to use the trivot's power without being corrupted by it, all while still dealing with his normal Hogwarts life and the threat of Voldemort in the background.
The plot could develop in a way that the trivot has some connection to Harry's past. Maybe it was something his parents left for him. As he delves deeper into understanding it, he uncovers secrets about his family and Hogwarts. He might have to face some enemies who also want the trivot, leading to intense battles and chases around the wizarding world.
Well, it could be that Harry Potter gets a magical item from the Trival in the fanfiction. Maybe it gives him some new powers that he uses to fight against Voldemort in a different way.
He could become more confident. With the new resources from his inheritance, he feels more secure in his place in the wizarding world. For instance, if he inherits a lot of gold, he doesn't have to worry about financial problems at Hogwarts.
In this fanfiction's plot, Harry's identity as the Boy Who Lived would be intertwined with his military upbringing. He could start a sort of 'wizarding army' within Hogwarts, recruiting students who are willing to fight against the dark forces. His training by soldiers would make him a natural leader in this regard. The story would then revolve around his efforts to build this army, face the opposition from some traditional wizards, and ultimately use this new force to defeat Voldemort in a more strategic and coordinated way.
The plot could start with Harry being born on a spaceship or a space colony. As he grows, he discovers his magical powers, which are different from those on Earth. He then gets a message or a sign that leads him to a quest. This quest might involve finding a lost magical object that has the power to save the space - wizarding community from a dark force. Along the way, he meets other magical beings from different parts of space and they form a team to complete the mission.
The plot could develop with Harry being abandoned in a big Japanese city like Tokyo. He might end up in the muggle part of the city at first and have to use his wits to get by. Eventually, he attracts the attention of Japanese wizards who are both curious and cautious about him. They take him to their magical enclaves where he discovers that there are different types of magic in Japan. There could be political intrigue within the Japanese wizarding community regarding Harry, with some seeing him as a threat and others as an opportunity. He has to navigate through all this while also dealing with his own feelings of abandonment.
If Harry receives a 'tre', his character might become more inquisitive. He's always been curious, but this new thing would drive him to ask more questions, dig deeper into the mysteries of the wizarding world. He would likely become more independent in his search for answers as he tries to figure out what the 'tre' is all about.
Perhaps 'tr' is a time - turning relic. Harry Potter gets it and is faced with the moral dilemma of whether to use it to change past events. He might consider using it to save his parents, but then realizes the potential consequences of messing with time. This could lead to a whole adventure where he has to make difficult decisions and also face the Time - Turner's side - effects, like being in two places at once in a confusing way.
The plot could involve Harry using his magic in a more open way around the Dursleys. They might help him hide it from the wizarding world until he's old enough to go to Hogwarts. Then, at Hogwarts, he could be more focused on learning for the joy of it rather than as an escape from his horrible home life.
The plot could develop with the female characters uniting to search for a solution. They might start by looking into ancient magic that was perhaps created or known only to female witches. Maybe they'd discover that a powerful female dark wizard from the past cast a spell that backfired and made all males disappear. And they'd have to go on a journey to reverse it.
The plot might start with Harry being taken in by Pitch Black at a very young age. Then, he would be taught things that are not part of the normal Hogwarts curriculum. As he grows older, he might start to question the motives of Pitch Black. This could lead to a conflict between them, and Harry could decide to break away and find his own path in the wizarding world, perhaps with the goal of using his unique skills for good.