Well, one key plot point could be the protagonist's struggle with his identity as the son of Acnologia. He might face discrimination or fear from others in the Fairy Tail world. Another could be his journey to master his unique powers, which are likely to be a mix of his own and some inheritance from his father. Also, there could be a plot about him finding his place in the guild, whether he is initially accepted or has to prove himself.
In a Son of Acnologia fanfiction, a major plot point might be the relationship between the main character and the existing characters in Fairy Tail. For example, how does he interact with Natsu? Does he see Natsu as a rival because of their dragon - related powers? And his relationship with Erza could also be crucial. Maybe she tries to mentor him in controlling his power. The plot could also involve him uncovering secrets about his father that have been hidden in the Fairy Tail lore.
The character develops by first coming to terms with his identity. At the start, he may be confused or even ashamed of being the son of Acnologia. But as the story progresses, he starts to accept it. His interactions with the Fairy Tail members play a big role. For example, if they show him kindness despite his heritage, it gives him the confidence to grow. His power development also contributes to his growth. As he becomes more powerful, he becomes more self - assured.
One possible plot could be that Acnologia, with his immense power, initially causes chaos within Fairy Tail. The members are both in awe and afraid of him. But as time passes, he starts to understand the concept of friendship and loyalty in Fairy Tail. He could then use his power to protect the guild from other major threats, like the Alvarez Empire. This would completely change the power dynamics in the Fairy Tail world.
In many Fairy Tail fanfictions, the battle between Natsu and Acnologia is often depicted as extremely epic. Natsu's fiery determination and his unique dragon - slayer magic make for an interesting contrast against Acnologia's overwhelming power. Some fanfictions might have Natsu discover new forms or powers in order to stand a chance against the fearsome Acnologia.
Some writers characterize Acnologia as a misunderstood loner. They show that his actions of destruction are a result of his past traumas. Others might make him more of a power - hungry villain who just wants to rule over all. There are also those who give him a sense of humor, which is a very different take from his usual brooding and menacing self in the original series.
A common theme in such fanfictions is Natsu's unwavering courage when facing Acnologia. He might not be as strong as Acnologia at first, but his will to protect his friends and the Fairy Tail guild drives him forward. His dragon - slayer magic could potentially have some hidden aspects that are only revealed during this encounter.
Perhaps a plot twist could be that the reincarnation as Acnologia is not a complete one. The character might start to transform into a hybrid form that combines the features of their Fairy Tail self and Acnologia. This new form could have abilities that are completely unique and unheard of in the Fairy Tail universe. And as a result, both the Fairy Tail guild and the other powerful beings in the world view this new form with a mix of fear and hope, not knowing exactly what to expect from it.
Well, usually in such fanfictions, key plot points might include Natsu's adventures in high school. Maybe he's the alpha, so he could be dealing with challenges like protecting his friends from bullies. Another plot point could be his relationships, perhaps a budding romance with a fellow student. Also, there could be some sort of magic - related mystery or competition within the high school setting.
The guild as a whole would likely mobilize. Erza would start formulating a strategic plan. She'd consider the strengths and weaknesses of Acnologia and figure out the best way to approach the situation. Gray would also be ready to fight, using his ice - make magic to support the rescue mission. They would all be united in their determination to get Lucy back safely.
A really interesting plot could be Acnologia in human form forming an unlikely alliance with the Fairy Tail guild. He could be on a quest to redeem himself for his past dragon - related atrocities and the guild helps him in some way. This could lead to many adventures where he has to use his human skills and not just his dragon powers.
Well, adapting to Acnologia's body could be a complex process. They would have to learn how to control the raw power within it. This power might be overwhelming at first, and they could accidentally cause destruction. To adapt, they might start by testing their limits in isolated areas. Emotionally, they would also have to come to terms with the fact that they are now in the body of a feared being. They might try to use their memories of Fairy Tail to bring out the good in this new form, like using Acnologia's strength to protect the weak as they did in their previous life.