In this fanfiction, the betrayal might also stem from jealousy. Harry is often in the spotlight, and the Weasleys, who have always been a big family but not always in the center of attention, could let envy get the better of them. This could lead to actions that Harry perceives as betrayal, like spreading rumors or withholding support when he needs it most.
Love could also play a role. Maybe one of the Weasleys falls in love with someone who has a vendetta against Harry. To please their love interest, they could end up betraying Harry. It's a more emotional and complex reason compared to the others, but it can add depth to the fanfiction story.
Another possibility is a miscommunication or false accusation within the fanfiction world. Someone could spread lies about Harry among the Weasleys, leading them to believe he has done something terrible and thus turning against him. But this is a far cry from the deep bond they share in the official 'Harry Potter' story.
A plot could involve a family secret. Maybe the Weasleys discover that Harry has some connection to an event in their past that they wrongly interpret as harmful, and this leads to their betrayal. For example, if they think Harry is related to someone who caused harm to their family long ago, even though it's a false connection.
Well, in some fanfictions, it could be that the Weasleys betray Harry because of Voldemort's influence. Maybe they are Imperiused to turn against him.
I haven't actually read this specific fanfiction, but it's a very dark and disturbing concept. In the normal 'Harry Potter' universe, Harry and the Weasleys are friends. So this fanfiction probably involves some sort of dark plot twist or alternate reality where Harry turns against them for reasons that could range from being influenced by dark magic to some misinterpreted prophecy or a huge misunderstanding.
There's a fanfic where Ron betrays Harry for fame. It's called 'The Broken Bond'. The story delves deep into how Ron's jealousy and the allure of being in the spotlight drive him to make a pact with some dark wizards against Harry. It's a great read as it explores the complex nature of friendship and how easily it can be broken in the wizarding world.
One interesting fanfic could be 'The Fallen Friendship'. In it, Harry discovers that his so - called friends have been secretly working against him due to a misunderstanding spread by a dark wizard. It shows Harry's journey of dealing with this betrayal and finding new allies.
Another scenario could be that an impostor, using some form of shape - shifting magic, disguises as a Gryffindor and does things that make it seem like Harry has betrayed the house first. As a result, the real Gryffindors, deceived by this false appearance, turn their backs on Harry.
One possible event could be a false accusation within the wizarding community. Maybe someone frames Harry for a serious crime, and his so - called friends believe it without really giving him a chance to defend himself. Another event could be a power struggle within Hogwarts or the wizarding world in general, where people see Harry as a threat and turn against him to gain an advantage.
One possible scenario in a fanfiction of Fem Tsuna being betrayed could be that her closest friends turn against her because of a misunderstanding. Maybe there was some false information spread about her having some ulterior motives in the mafia world she's involved in. So, her friends, who used to trust her completely, start to distance themselves and even plot against her.