Who could be a great new character in a Harry Potter 3rd year fanfic?

A young auror - in - training who is sent to Hogwarts to keep an eye on things. They could befriend Harry and the gang, and offer some insights into the wider wizarding world and the fight against Voldemort. Plus, they could have some interesting backstories and motives.

An old ex - Auror who now lives near Hogwarts. He could have a past connection to Voldemort and some knowledge about the Dark Arts used in the Triwizard Tournament. He becomes an unofficial mentor to Harry, teaching him some unique spells and strategies that are not part of the regular Hogwarts curriculum. This character could bring a new perspective and a bit of wisdom to the story.

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.

A young wizard from a nomadic wizarding tribe. This character could have skills in magic related to the elements in a very unique way. For instance, they can control the wind to fly without a broomstick, which would be amazing in the Triwizard Tournament tasks. They would also bring in a different cultural aspect to the story with their tribal traditions and beliefs.

A dragon - tamer from a nomadic magic tribe. This character could have grown up around dragons and have a deep understanding of their behavior. They could be a wild card in the tournament, not really following the traditional Hogwarts ways of dealing with dragons and bringing a fresh perspective.

It might be a new transfer student from a far - off magical school. This student brings with them the knowledge or potential to be the new Merlin figure. They could have a different approach to magic compared to what's taught at Hogwarts, which makes them stand out as a possible Merlin - like character.

An old witch who was once an apprentice to the maker of the Wonder Wand. She could hold many secrets about the wand's construction and powers. Her character could be a bit of a mystery, and she could either help or hinder Harry depending on her own motives.

A character like a half - elf half - wizard who has a special connection to the Ravenclaw Diadem. Maybe they were born in the Forbidden Forest and their elven heritage gives them an intuition about magical artifacts. They sense the diadem's power and are drawn to Hogwarts to protect it from those who would use it for evil.

A young wizard from a far - flung magical community that has different magic traditions. He could be a bit of an outcast at Hogwarts because his magic is so different, but his unique skills could come in handy during the Triwizard Tournament. For example, he might use a type of magic that involves communicating with plants to get through a task.

Maybe it's a character who has been in the background in the original books but now gets their chance to shine. Like a house - elf who decides to break free from their servitude and start a new life. They could discover their own magical powers that were suppressed all this time and use them to create a whole new existence for themselves in the wizarding community.