The main characters would likely include the students at Hogwarts. Harry Potter and his friends like Hermione and Ron might be among them, even if they are not directly in the battle but are being watched by the others.
It's possible that some of the Hogwarts professors, such as Professor Dumbledore or Professor McGonagall, are main characters. Dumbledore with his vast knowledge of magic and McGonagall with her no - nonsense attitude. They could be guiding the students in their investigations of the graveyard or trying to keep them safe from any potential threats.
Perhaps a key plot point is how the castle itself reacts during the battle. In the fanfiction, it might show Hogwarts as a sentient entity, protecting its inhabitants in unique ways as it witnesses the final showdown. This could include magical barriers or even the portraits getting involved in some way.
Harry Potter himself is very likely to be highlighted. After all, he was a central figure in the original final battle. His actions and decisions would still be crucial in the fanfiction. Hermione Granger and Ron Weasley are also probable. Their friendship with Harry and their own magical skills would make them important in any retelling of the final battle.
Harry Potter would likely be an important character, even if he's the one competing in the task, the fanfiction might focus on how others at Hogwarts view him during it. Hermione and Ron are also important as they are his friends and would be watching him closely.
In addition to Geo, his partner Omega - Xis might also play a significant role. They usually work together, so in this fanfiction, Omega - Xis could be providing commentary or analysis as they watch the battles in Death Battle. And Luna Platz might also be there, adding her own reactions and insights.
Obviously, the Z Fighters like Goku, Vegeta, Piccolo, etc. are the main ones as they are the ones doing the watching.
I don't know as I haven't read it. Maybe it has a brave hero and a cunning villain as main characters.
Luna Lovegood could be a main focus. Her unique perspective on magic could be used to discover new magical phenomena that emerged after the battle. She might also be helping the other students deal with their post - battle stress, using her calm and dreamy nature to soothe them.
Obviously, Sonic himself is extremely popular. He's the main character, after all. Tails also often makes an appearance as Sonic's sidekick. Knuckles is another popular one, with his strength and connection to the Chaos Emeralds. And then there are the villains like Dr. Eggman who are frequently part of the death battle scenarios in these fanfictions.
In the world of Harry Potter, Hogwarts is a school, not a sentient being that can 'watch' fanfiction. However, students at Hogwarts might be interested in reading or writing Harry fanfiction as a form of creative expression related to their magical world.