One great idea is to write about Lucy's training journey to become an even more powerful mage. Maybe she goes to a secret magical academy where she learns advanced techniques to control her Celestial Spirit powers. She could face challenges and make new friends along the way, and this would show her growth as a character in a positive and meaningful way. This is much better than focusing on inappropriate physical aspects.
A better fanfiction idea for Lucy could be her exploring new Celestial Spirits that are not part of the main story. She could go on a quest to find a powerful and mysterious spirit that has been lost for centuries. This would involve her using her wits, her magic skills, and her connections with her existing spirits.
No, it's not suitable. Fairy Tail is a story full of magic, battles, and deep emotional bonds between characters. Lucy is a strong female character with her own story arc related to her family, her magic powers, and her place in the guild. Fanfiction should enhance these elements rather than going into inappropriate and objectifying directions like the so - called 'breast grow' concept.
One common theme could be character development. As Lucy experiences this change, it might be used to explore her self - confidence or how others in the Fairy Tail guild react to her differently. Another theme could be the exploration of body image within the context of the Fairy Tail universe. It might also touch on magical or unnatural causes for such growth, like a spell gone wrong or a new, untested magic power.
Well, one possibility could be that the story focuses on how Lucy adjusts to her new state. Maybe she has to cut back on her guild missions at first. She might worry about how Natsu and the others will react. It could also involve her having strange pregnancy cravings that lead to some comical moments in the guild. And as her pregnancy progresses, she could start preparing a nursery in her home, all while still being part of the Fairy Tail family.
Maybe she just lost interest in the Fairy Tail world. Fanfiction can be a passing fancy, and her enthusiasm might have waned over time.
In some fanfictions, Lucy's true power might be related to her celestial spirit heritage in a deeper way. Maybe she can merge with her spirits on a more profound level, not just summoning them for combat. This could give her enhanced physical and magical abilities.
Perhaps it's a power related to the stars in a more direct way. Like she can draw energy from specific constellations and use it to enhance her attacks. For example, if she summons the power of Orion, she gets super strength and accuracy in her attacks.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.
In a fanfiction, there could be a situation where Lucy is forced to side with a group that Natsu is against. This would make Natsu see her as an enemy. Or perhaps there is a prophecy that Lucy is involved in that Natsu misinterprets as something bad. He might think she is a threat to the guild or his friends. Also, if there is a love triangle situation where Lucy chooses someone else over Natsu in a way that really hurts his feelings, that could be a reason for him to start hating her.
One idea could be that Jackal, after some soul - searching, decides to turn over a new leaf and teams up with Lucy. They could go on a mission to retrieve a powerful magical artifact that was once used by an ancient dark wizard. Along the way, Jackal's knowledge of the dark arts helps them navigate through various traps, while Lucy's celestial magic provides the offensive and defensive power they need.
Midnight might use his illusions to make Lucy think she's lost her Celestial Keys. This would be a huge psychological blow to her. But then Lucy could remember the bond she has with her spirits and break through the illusions. It would be a battle of wills as much as magic.