In some fanfictions, Harry's dyslexia could be a sign of his unique connection to the ancient magic. Since he is often at the center of extraordinary magical events, his dyslexia could be a part of what makes him special. It could be that the magic within him is so strong that it affects his perception of normal reading and writing in the Muggle sense.
Some fanfictions interpret Percy's dyslexia as a connection to an ancient magic that was long forgotten. This magic was meant to be a safeguard for demigods, and his dyslexia is the manifestation of that dormant power. So, instead of just being a disability, it becomes a powerful tool waiting to be fully unlocked.
I'm not sure of specific titles off - hand. But it could be a story where Hermione, being the studious one, tries to find a magical solution for a friend with dyslexia. Maybe she discovers an ancient spell in the library that could potentially help.
In some fanfictions, Harry's piercings might be related to a new fashion trend in the wizarding world. He could be at the forefront of this trend, with other students looking up to him. His piercings could also attract the attention of certain characters, like a love interest who is drawn to his edgy and modern look.
Perhaps his wings are related to his connection with his Patronus. Since his Patronus is a stag, the wings could be like an extension of that magical energy. They might give him the ability to soar high above Hogwarts and keep an eye on the school grounds, almost like a guardian angel. He could use this newfound ability to sense danger from afar and protect his friends more effectively.
One possible story could be about Harry struggling to control his epilepsy while also dealing with the challenges at Hogwarts. Maybe he discovers a new spell or potion that helps him manage it better.
One interesting story could be where Harry discovers he has fangs due to a dark magic spell gone wrong. He has to hide it from his friends at first, but then they find out and help him find a way to reverse it.
One possible plotline could be Harry struggling to hide his Tourettes symptoms at Hogwarts in the beginning. He might be afraid of being judged by his classmates. For example, during a Potions class, his tics could cause him to accidentally add the wrong ingredient, leading to a minor magical mishap. Another plotline could involve Harry using his magical abilities to find a way to manage his Tourettes better. He could go on a quest to find a rare magical herb or spell that helps him control his tics. Also, his friends like Hermione and Ron could play a big role in supporting him, learning about Tourettes, and standing up for him when others are unkind.
In a fanfiction about Harry Potter having diabetes, there could be a plot where Harry discovers a new type of magic that is related to his condition. Maybe he finds that certain spells can help him better manage his blood sugar levels. His relationship with the Hogwarts staff could also be explored. For example, Madam Pomfrey might be at a loss at first as she's used to dealing with more typical wizarding ailments. But then she works with Harry to come up with a plan to keep his diabetes in check. This could also lead to a greater understanding of muggle diseases in the wizarding community.
Another possibility is that 'master dada' is a mispronunciation or a childish term used in a fanfiction that is set in the early years of Hogwarts for a teacher or a powerful wizard. It could be a term that the young students use among themselves, perhaps in a comical or endearing way. For example, if there is a new teacher who is a bit of an enigma, the students might come up with this term to refer to them until they learn more about who they really are.
Some fanfictions might depict Harry's death as a way to unite the wizarding community. His death could be the catalyst that makes different factions realize they need to come together and put aside their differences. For example, the pure - bloods, half - bloods, and Muggle - borns might finally find common ground in the face of such a great loss.