One idea could be to explore the origin story of the Crimson Dragon Emperor in more detail. Maybe there was a long - forgotten prophecy that led to his existence.
The power - up trope is also popular. For example, the Crimson Dragon Emperor discovers new abilities or unlocks hidden powers as the story progresses. This keeps the readers engaged as they anticipate his next level of strength.
Perhaps a plot where the Crimson Dragon God Emperor has to form an unlikely alliance. For example, teaming up with a group of rebels who initially oppose him but then realize they need to work together to face a greater threat like a cosmic catastrophe that could destroy their world. This would involve a lot of character development and conflict resolution as they learn to trust each other.
One idea could be a prequel fanfic that delves into the backstories of the main characters before the events of the original. For example, exploring their early days in the police force or their first encounters with the strange cases that would later shape them.
Well, the Crimson Dragon God Emperor himself is surely one of the main characters. He's likely to be a powerful and complex figure with his own set of goals and values.
In this fanfiction, the battle between Shirou Emiya and the Crimson Dragon Emperor likely showcases an exciting clash of powers. Shirou's abilities, which are often related to projection magic, would be pitted against the Crimson Dragon Emperor's unique powers, which may include enhanced strength, fire - based attacks, and perhaps some form of dragon - like abilities. It would be interesting to see how the author portrays the strategic thinking of both characters during the fight.
One idea could be exploring the origin of the 'crimson darkness'. Maybe it was created by an ancient and powerful magic that has been lost over time. Another could be a story about a hero who has to face the crimson darkness alone and discovers a way to purify it.
Maybe the story could be about a group of outcasts. The 'crimson' is a symbol on their bodies that marks them as different. Their ennui comes from being constantly ostracized. As the fanfic progresses, they find a way to turn their mark into a strength and fight against the society that shunned them.
Well, a really interesting plot twist could be that the Crimson Dragon Emperor has a hidden connection to Shirou's past. Maybe it was involved in an event that shaped Shirou's life without him knowing. This would completely change the dynamic of the fight. Another plot twist could be that Shirou's power suddenly backfires during the fight, putting him in a dangerous situation where he has to rely on his wits rather than his magic. Or perhaps the fanfiction could introduce a time - travel element, where the fight is not really in the present but is part of a loop in time that they need to break.
I don't know who the author of 'the crimson dragon novel' is. There could be many authors out there with such a work.
I'm not sure specifically as I haven't read it. It could be about a crimson - colored dragon and perhaps its adventures, battles, or its role in a fantasy world.