Dumbledore also often appears. As the headmaster of Hogwarts and an important figure in Harry's life, he can play a role in the fanfiction in relation to Harry and his mother. He might offer advice, or be involved in the events that surround their relationship, such as when it comes to protecting Harry from the dark forces that are after him.
One character that often appears is James Potter. Since he was Harry's father and Lily's husband, his presence in the fanfiction can add more depth to the family dynamic. For instance, we might see scenes of the three of them together as a family, or James sharing his own experiences with Harry through Lily.
One popular theme could be exploring the relationship between Harry and his mother in an alternate universe where she survived. For example, how she would guide him in his wizarding education and protect him from Voldemort in a different way. Another theme might be the backstory of his mother, like her days at Hogwarts and the friendships she made that could have an impact on Harry's life.
Hermione is often in these fanfictions. She might help Harry understand the more complex magical aspects related to his broomstick. For example, she could research ancient spells that were once used to enhance broomstick speed and try to apply them to Harry's broom.
The main characters are obviously Harry and his mom. Harry is a well - known character from the Harry Potter series, and his mom is an important figure in his life even though she passed away early in the original story.
A previously unknown family member could be an important character. For example, an older cousin or an aunt who has been in hiding due to some dark secret related to the family's heritage. They could appear and help Harry navigate the complex world of his family's past, teaching him things that his parents were unable to before their untimely deaths.
In some cases, there might be new original characters created specifically for the fanfiction. These could be characters who have a connection to the ancient magic of Merlin and Morgana. For example, a mysterious wizard who has been guarding an artifact related to their power. They could initially be an enigma to Harry and his friends, but as the story progresses, they become an important part of the plot, either as an ally or an adversary.
A healer who was a friend of Lily's could be introduced. This healer could have some special knowledge about the magic that Lily used to protect Harry, and could help Harry understand more about his mother's abilities.
One major theme is the power of a mother's love. In many 'Harry Potter and his mom fanfiction', Lily's love is depicted as a force that can even change the course of magic. There are also themes of family secrets. Maybe there are things about Lily's family or her own past that Harry discovers through these fanfictions, which add more depth to their relationship. Additionally, the theme of redemption can also be found, where Harry and his mother's connection helps in redeeming certain characters or situations.
The dragon, of course, is a major character. It could be named something unique like 'Fyrstorm'. There might also be Hermione and Ron. Hermione would probably be worried about the legality and danger of raising a dragon, while Ron might be both scared and a bit excited about it.
Hermione would surely be involved. She could be Harry's research partner, helping him find relevant medical information in books and scrolls. Her intelligence and thirst for knowledge would be very useful in exploring new areas of medical magic. Another character could be Madam Pomfrey. She could be Harry's mentor, teaching him the basics of wizarding medicine and guiding him in his new role as a medic.
Hermione and Ron are usually quite common. Since they are Harry's best friends, they would be involved in the story when Harry's parents return. They might be curious about his parents, and also help Harry and his parents adjust to the current situation.