It's hard to give an exact number. The count could change over time as new ones are published or older ones go out of print. You might want to check with specific publishers or dedicated comic databases for the most accurate count.
Well, Harry is the main character we all know from the original series. He's brave and has a strong sense of justice. Daphne, on the other hand, is a character that in this fanfiction during their third year, could be portrayed as a complex individual. She might be a bit of an enigma at first. She could be smart, coming from Slytherin, and have her own motives and goals that intersect with Harry's during this year. Maybe she's trying to prove herself in a different way compared to the other Slytherins, and Harry becomes a part of that journey for her.
Maybe it could involve Harry and Daphne working together on a school project during their third year. They might start off as reluctant partners but gradually become friends as they discover each other's strengths.
Assassination Classroom (3rd Year Class E), OAD Ova, etc. can be watched on Japanese online video sites such as Facebook, Amazon Prime Video, etc. These works were often called "animated films". Unlike the original novels and comics, they were distributed through television or cinemas. If you want to watch these works, it is recommended to first determine whether there are legal viewing channels in the area and understand the local laws and regulations.
It could also be a dark wizard from the past who has been trapped in a hidden part of Hogwarts and is now released during Harry's third year. This wizard could have a vendetta against the Potter family or Gryffindor house and start causing trouble.
The setting of Blindness is a place where everyone loses their sight. It shows how a community struggles to function without the sense of sight. This creates a unique and challenging backdrop for the story to unfold.
A really cool plot idea would be if there was a new magical creature introduced in Harry's third year that was related to the Dementors in some way. Harry could have to learn about this creature to better understand how to combat the Dementors and it could add a whole new layer to the story.
He might face the challenges of the Marauder's Map all over again. Since he already knows about it, he could use it in new and unexpected ways to outwit his enemies or just to have some fun exploring Hogwarts secrets.