Kaiju novels often portray kaiju as gigantic and powerful beings. They are usually depicted as forces of nature that are difficult to control or defeat. For example, in 'Godzilla' novels, Godzilla is shown as a nearly indestructible creature with its atomic breath and massive size.
The main character, Kafka, is often a popular one in fanfiction. Writers might put him in various new situations or develop his character further, like exploring his emotions more deeply during battles.
Another aspect could be alternate endings or plot twists. For example, what if the main character had a different power - up sequence? It could completely change the dynamic of the story and the battles against the kaiju. Fanfiction allows for these creative reinterpretations.
One idea could be a kaiju fanfiction where the kaiju form an alliance with humans to fight against an even greater threat from outer space. It would be a unique twist on the usual kaiju - human conflict.
First, you need to choose your kaiju. Decide whether you want to use existing kaiju from movies or create your own. Then, think about the setting. Is it a modern city, a future world, or a different planet?