Obviously, Lucy is one of the main characters. And the dragons would also be main characters as she is training with them.
The 'lucy trains with the dragons fanfic' might revolve around Lucy's journey of self - discovery through training with dragons. Dragons are often symbols of power and mystery in fantasy. So, perhaps Lucy starts off as an ordinary person, but as she trains with the dragons, she discovers hidden powers within herself. She could be training to become a dragon rider, which would require her to learn how to communicate with the dragons, understand their behavior, and master the art of flying on their backs. It could also include elements of her facing challenges within the dragon community, like dealing with rivalries among different dragon groups.
Obviously, the main characters are Kurenai and Sakura. Kurenai is the trainer and Sakura is the one being trained.
The baby's father, whoever he is, could be another main character. He might be a mysterious figure at first, and as the story progresses, his identity and his relationship with Lucy get explored more deeply. He could be a guy from Lucy's past that she has complicated feelings for.
Obviously, Lucy Lemons is a main character. But often, there can be her best friend, like Lily, who is always by her side in the fanfic. There might also be a mentor figure, perhaps an old lady named Mrs. Green who gives her advice.
There could be a young wizard named Tom. He might be Lucy's sidekick or someone she mentors. He could have his own set of magic skills that complement Lucy's dragon powers. Another character could be an old dragon sage named Zoltar. He might be the one who gives Lucy advice and wisdom about her role as the dragon goddess.
There could also be new characters introduced in the fanfic. Maybe a new mentor figure who guides Harry in his training. This character could have unique magical abilities and knowledge that they pass on to Harry. Another possibility is an antagonist who tries to disrupt Harry's training for some reason, adding conflict to the story.
I'm not sure specifically as it depends on the author of the fanfic. But it could include the classic Harry Potter characters like Harry, Hermione, and Ron. They might be on the train for some special reason related to their fight against Voldemort or some other new threat.
Harry is the central figure, but there might be some new characters introduced in the fanfic. For example, an old wizard who lives on the outskirts of Hogwarts and has some unique knowledge about magic that Harry discovers. This character could become a sort of mentor, even if from a distance, as Harry trains himself using the knowledge he imparts. Also, there could be antagonists like some students who are jealous of Harry's self - improvement and try to disrupt his training.
The main characters are Cooler and his mother. Cooler is likely the protagonist with an interest in trains, and his mother plays an important role, perhaps as a guide, supporter, or co - adventurer.
Well, obviously the Twin Dragons themselves are the main characters. They usually have distinct personalities. One might be more impulsive and the other more cautious. There could also be side characters like their friends or allies. For example, a wise old wizard who gives them advice from time to time.