Well, Gray might be an ally. He has his own ice - making abilities which could complement Lucy's elemental dragon - slaying skills. Wendy, as a sky dragon slayer, could share her knowledge about dragons and dragon - slaying with Lucy. She could also heal Lucy if she gets injured during battles. Another possible ally is Levy. With her knowledge of magic books and runes, she could help Lucy understand more about the history and secrets of elemental dragon slaying.
Natsu could be a great ally. Since he is also a dragon slayer, he could offer advice and support to Lucy in her elemental dragon - slaying journey. Happy, Natsu's flying cat companion, could also be helpful in terms of providing transportation and some comic relief. Erza is another potential ally. Her strong combat skills and leadership could be valuable when Lucy faces tough dragon - slaying challenges.
Other dragon slayers could be her potential allies. They might recognize her skills despite her being a princess. Also, magical creatures who are enemies of the dragons, like phoenixes or griffins, could side with her. And some wise old wizards or witches who see her potential might offer their help.
Natsu could be one of her potential allies. Since he is a dragon slayer himself, he could understand some of the challenges Lucy faces as a Dark Dragon Slayer. He might offer his fire - based powers to complement Lucy's dark dragon slaying abilities. Another could be Erza. With her strong combat skills and leadership, she would be a great asset in battles against dark dragons. Erza could also protect Lucy when she is still learning to control her new powers.
One common theme could be self - discovery. Lucy might discover new powers within herself as an Elemental Dragon Slayer, leading to a journey of understanding her true potential. Another theme could be friendship. She may form strong bonds with other characters while on her dragon - slaying adventures. Also, the theme of facing one's fears is likely. Confronting powerful dragons would surely test her courage and force her to overcome her fears.
There could be a wise old mentor who was also a poison dragon slayer in the past. He can guide the main slayer with his years of experience and knowledge about different poisons and dragons.
Well, obviously Lucy is one of the main characters since it's in the title. She's likely to be the central figure around which the story revolves. There might also be other dragon slayers who could be important characters. They could be friends or rivals to Lucy, and their interactions with her would shape the story.
One interesting aspect could be how she trains to become a Celestial Dragon Slayer. Maybe she discovers an ancient magic that combines the two, and she has to learn to control the newfound power. This could lead to some great character development as she struggles with the increased power and the responsibility that comes with it.
Well, if we consider Lucy as a Dragon Slayer in fanfiction, her magic could be really different from the traditional ones. Maybe she'd have a connection to a celestial dragon, which would be so cool. It would combine her existing celestial spirit magic with the new dragon slayer powers. She could use the stars as a source of power, similar to how other dragon slayers use elements, and it would be a fresh take on her character.
Potential allies could be the Greybeards. They are known for guiding the Dragonborn, and if they recognize the Dragon Priest as the new Dragonborn, they might offer their wisdom and support. Enemies could be the Thalmor. They often oppose powerful individuals who could disrupt their plans, and a Dragon Priest - turned - Dragonborn would be a huge threat to them.
The Straw Hat Pirates could be great allies. Luffy is always open to new friends and they could help her with her goals. Another could be Trafalgar Law. His skills and his own motives might align with hers at some point.
Natsu could be a great ally. Since he also has dragon - related powers, he could offer advice and fight alongside Wendy when she's in Dragon Force. Their combined dragon powers could be a formidable force against enemies.