One idea could be to explore the backstories of the characters in more detail. For example, how did they come to be the way they are before the main events of the original story. Another could be to create an alternate universe where the characters have different abilities or relationships.
A great plot for 'advance bravely fanfiction' might be to have the characters go on a quest that is not in the original story. They could face new challenges and enemies, and in the process, develop their characters further. This could also lead to new alliances and romances among the characters.
You could write a fanfiction where the events of 'advance bravely' are re - told from a different character's perspective. This would give a whole new view of the story. For instance, if a minor character was made the narrator, we might see the main characters in a different light, and understand their actions and motives in a new way.
Chapter 416, ", are you still going to collect the Imperial Tax?", is the clearest early answer because it turns Star Domain's situation into a concrete plot event. The chapter turns that into something concrete by moving from Was Gu Hang using the war to expand the alliance's influence? to When communicating using Star Language, he could distinctly sense....
Chapter 372, ", State Religion Also Needs Alliance Control", is the clearest early answer because a shaky connection becomes usable in the plot. It opens with Medici was once a member of the Blood Rose Sorority, and a... and closes on It won't do too much, wouldn't that be fine?.
Chapter 428, ", I am the Dominant Bishop!", is the clearest early answer because it turns Jindi Star's situation into a concrete plot event. It opens with In the span of over a year, she thrived on Jindi Star like a fish in... and closes on She smoothly passed the review conducted by a council of six.... The key payoff is that the chapter closes with The grade of Dominant Bishop was sufficient., which gives Jindi Star a stronger narrative position and pushes the power growth onward.
Chapter 351, ", 'Prey", is the clearest early answer because it turns Alliance's situation into a concrete plot event. The setup is As the soldiers on Korolya prepared for the final desperate effort..., but the pressure keeps building through The Governor himself was on a field trip..
Chapter 357, ", Meat Mountain", is the clearest early answer because it turns Psychic's situation into a concrete plot event. The chapter gives readers a real answer by opening on Normally, arriving at Fino City in this manner would be impossible. and ending on Yet, Psychic teleportation could break through physical distances but....
Chapter 441, ", Must Not Let Down the Heroes!", is the clearest early answer because it turns Zhang Zhikai's situation into a concrete plot event. The chapter gives readers a real answer by opening on Hurry!" The staff officer outside shouted while Zhang Zhikai seized... and ending on What good was this small flashlight against a killing machine?.
Chapter 360, "Mission Accomplished", is the clearest early answer because it turns Demon Engine's situation into a concrete plot event. It opens with The Void Shield over Fino City has dissipated!" Hearing this, Major... and closes on Commander Gu was a capable man; his orders weren't given blindly..
Chapter 471, ", Victory Strategy", is the clearest early answer because it turns Light Blessing Star's situation into a concrete plot event. The chapter turns that into something concrete by moving from Golden Pass Star Sector is an important location, not just speaking... to This would fatally affect the efficiency of material transfer..
Chapter 368, ", Not Enough Troops", is the clearest early answer because it turns Gu Hang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with After meeting with Lois, Gu Hang still managed to get what he wanted. and follows through with Even with the forty million troops of the Star Realm Army and....
Chapter 440, ", I don't want casualty numbers, I just want Gaomen Ridge", is the clearest early answer because it turns Green Skins's situation into a concrete plot event. The setup is When the Beastman Overlord truly gathered the vast Green Skin army,..., but the pressure keeps building through This hundred-kilometer battle line was subjected to a powerful....