It could be a new student at Hogwarts who discovers the light wand. This character could be an outsider, coming from a non - magical family, and the wand becomes their key to fitting in and making a name for themselves at Hogwarts.
Maybe an old wizard who has been in hiding for years. He emerges when the light wand is discovered because he has a connection to it from his past. He then guides the younger wizards on how to use the wand's powers properly.
Maybe it's an old wandmaker from a far - off land. This wandmaker has been crafting wands for centuries and has a unique intuition about which wands are meant for which wizards. He sees something special in Harry and presents him with a new wand.
Voldemort could still be the main antagonist. Even with a new wand, Harry is still a threat to him, and Voldemort would be eager to get his hands on such a unique and powerful wand.
Harry Potter himself is often a main character. Since the fanfiction is related to the Harry Potter universe, he might be on a new adventure involving his wand and a special shield. Hermione Granger could also be a key figure, using her intelligence to study the properties of wands and shields. Ron Weasley might be there too, providing his loyalty and sometimes comic relief as they face challenges related to these magical items.
There's a chance that the maker is a new character, an old hermit wizard who lives deep in the Forbidden Forest. He has been observing Harry from afar and realizes that the wands available in the regular market are not sufficient for him. So, he uses his knowledge of forgotten magics to craft a custom wand just for Harry.
A new character could be an ancient wizard who was once a rival of the wizard who first owned the Elder Wand. This wizard has been in hiding for centuries but now resurfaces because of the Elder Wand's newfound prominence. Another interesting character could be a young witch who has a natural affinity for the Elder Wand and is drawn to it, even though she doesn't fully understand why. She could be a wildcard character, not clearly on Harry's side or the side of those who would misuse the wand.
Hermione is often involved. She might help Harry understand the complex magic associated with the Elder Wand. For example, she could research in the library to find out any hidden lore about the wand.
Well, Harry Potter is surely one of the main characters since it's about him as the Prince of Light. Hermione Granger and Ron Weasley are likely to be important as well, as they are Harry's closest friends in the original series. There may also be other characters from the Harry Potter universe like Dumbledore, who could play a role in guiding Harry in his new role.
It could be Dumbledore. He always had a way of presenting Harry with things that would help him on his journey. Maybe Dumbledore had been holding onto this second wand for a special occasion or because he knew Harry would need it in the future.
It could be from a far - off land. Maybe it was crafted by a reclusive wizard in a distant mountain range. This wizard might have used unique materials and spells to create it, and for some reason, the wand made its way into Harry's hands.
The fusion could be shown as a chaotic yet beautiful event. Sparks could fly from the wands as they touch, and the magic within them could seem to fight at first, like two different forces trying to assert dominance. But then, as they start to meld, the chaos gives way to harmony. The colors of the magic, say the warm red - gold of Harry's wand and the cold, steely grey of the Elder Wand, could blend into a new, unique color. And the resulting fused wand would look as if it was crafted by the most skilled wand - maker, with an otherworldly beauty and an aura of great power.