Often, there is a dark lord or antagonist who is associated with the power of darkness. This character might be power - hungry and use the dark power to oppress others.
There could also be a hero or a group of heroes. They might be ordinary people at first but are drawn into the conflict involving the power of darkness. For instance, a young wizard who discovers that his family has a connection to the power of darkness and he has to stop the dark lord from using it for evil.
I'm not sure as I haven't read the novel. But typically, in a novel about power in the darkness, there might be a protagonist who is on a quest to understand or obtain this power. There could also be a mentor - like figure who either guides the protagonist or tries to stop them. And of course, there would likely be antagonists who oppose the protagonist's journey regarding the power in the darkness.
I'm not sure specifically as I haven't read it. But usually in such a novel, there could be a protagonist who is likely to be a complex character, perhaps someone who is initially weak but grows in power. There might also be an antagonist who stands in the way of the protagonist's power - seeking journey.
Naruto would probably be a central character. Given that he is the protagonist of the original series, in a fanfiction about the power of darkness, his reaction to this new and dangerous power would be crucial. Sasuke is also likely to be involved. His own struggle with power and his complex relationship with Naruto could be further explored in the context of the power of darkness. Kakashi, as a mentor figure, might play a role in guiding or trying to prevent the younger characters from being consumed by the power of darkness.
One common theme is the struggle between good and evil. Characters with the power of darkness may be tempted to use it for selfish or malevolent purposes, while others try to resist. Another theme is redemption. A character who has been consumed by the power of darkness may seek to atone for their actions.
Ruby Rose is often a common character. Given her role as the main protagonist in RWBY, it's natural for her to be involved in fanfictions set in the Vale of Darkness. Her courage and determination would be put to the test in such a dark and dangerous setting.
Some fanfictions may include animal characters that are associated with the sakura. For example, a magical fox that guards the sakura grove or a bird that can communicate with those who possess the sakura power. These characters add an element of magic and mystery to the story.
Jenny Romano is also quite popular in 'the darkness 2 fanfiction'. She has a deep connection with Jackie, and her presence often adds an emotional aspect to the stories. Writers like to explore their relationship further in fanfictions, whether it's about protecting her or dealing with the consequences of his actions on their relationship because of the Darkness.
There might be a loyal servant or a sidekick. This character could be someone who has always been by the princess's side, offering advice and support. For example, a little imp - like creature who is wise in the ways of the dark realm.
In fanfiction, anime worlds with the power of darkness often bring out unique and thrilling stories. Writers can create new characters with dark powers, or explore how existing characters are affected by this power. It allows for a deeper dive into the psychological aspects of the characters as they grapple with the allure and danger of darkness.
Some fanfictions might feature new or original characters as the ones who absorb Naruto's power. These characters could be created specifically for the fanfiction to explore unique storylines. For example, a mysterious outsider who arrives in the Naruto world and has the ability to absorb powers. They target Naruto because of his reputation as a powerful ninja. They may not understand the full implications of absorbing his power and end up causing chaos in the process.