Maybe he got injured in a new dark wizard battle. The eyepatch could be a sign of his sacrifice and new - found determination. It would add a cool, rugged look to his character and could lead to new relationships as people view him differently.
It could be that there's a magical curse that affected his eye. To prevent the curse from spreading or causing more harm, he has to wear an eyepatch. This would be a major setback for him, but also an opportunity for character growth. He would have to learn to adapt to this new situation, both in his daily life at Hogwarts and in his battles against the forces of evil. His friends would rally around him, and there could be a whole arc about how they help him deal with this new disability.
In the fanfiction, he might be on a secret mission where he needs to disguise himself. The eyepatch could be part of this disguise. He could be infiltrating a group that has a connection to an old enemy, and the eyepatch helps him blend in and not be recognized as Harry Potter right away. This would lead to all sorts of tense and exciting situations.
He may develop a more reckless side. Feeling like he has something to prove now that he has this 'disability' of sorts. He could be more willing to take risks in battles, thinking that he has less to lose. This new - found recklessness could either lead to great victories or put him and his friends in more danger than before.
In this fanfiction, Harry might be transported to a parallel magical world in Japan while wearing the kimono. There, he has to adapt to the different magical customs and traditions. He could meet Japanese wizards and witches who help him on a quest to find a way back to his own world. Along the way, he learns about the significance of the kimono in their culture and how it can be used as a magical tool.
One possible plot could be that Harry is trying to fit in with a new group of wizard friends who are into a more punk - rock or alternative style. Wearing eyeliner is his way of showing that he belongs with them and is embracing a different side of himself.
One possibility could be that Harry wears a mask to hide his identity while on a secret mission for the Order of the Phoenix. Maybe he's infiltrating a Death Eater gathering and the mask helps him blend in without being recognized as the famous Boy Who Lived.
Perhaps it could be set in an alternate universe where Harry is a baby and the wizarding world is facing a threat that only baby Harry can solve because of a special power he has that is related to his diaper. The diaper could be enchanted in some way, and throughout the story, Harry's innocent actions while wearing it end up having a big impact on the events in the wizarding world. This would be a fun and light - hearted plot without being offensive.
Well, in fanfiction, the hat might have magical properties that are not in the original series. It could be a hat that gives him special powers like the ability to communicate with magical creatures that he couldn't before. It could also be a sign of a new adventure. For example, if the hat was given to him by a mysterious character, it could lead him on a quest to discover the origin of the hat and its powers.
Well, it could be a sign of a newfound friendship or an unexpected truce between them. Maybe Harry lost his tie and Draco, in a moment of kindness, lent his. This simple act could lead to them getting to know each other better and breaking down the barriers of their rivalry.
One possible plot could be that a spell goes wrong and Harry is regressed to an infant - like state, complete with wearing diapers. His friends Hermione and Ron are baffled but determined to help him. As they search for a way to reverse the spell, they have to take care of Harry like a baby. This includes things like feeding him baby food made with magical ingredients, changing his diapers, and protecting him from those who might take advantage of his vulnerable state. The story could be full of humorous situations as the trio navigates this strange new dynamic.
It could be a story where a spell goes wrong and Harry is turned into a baby again. The plot might revolve around his friends trying to reverse the spell while Harry is stuck wearing a diaper and having to rely on them completely. There could be a lot of comical moments as his friends struggle to take care of him in this state, and Harry tries to convey his thoughts and memories through baby - like actions.
Well, perhaps in this fanfiction, when Harry Potter wears Tobi's mask, he gains some of Tobi's mysterious powers. He could use these powers to secretly spy on the Death Eaters, getting valuable information to help the Order of the Phoenix. Maybe the mask also gives him a new look that confuses his enemies, and he uses this to his advantage in battles.