One idea could be exploring the backstories of the Four Kings before they became corrupted. Maybe they were once noble knights who were slowly influenced by the power they sought. Another could be a story where a new character tries to redeem the Four Kings instead of just defeating them. For example, this character could find a way to break the curse that binds them to their evil deeds.
A great idea for a 'Dark Souls Four Kings' fanfiction could be to set it in an alternate timeline. In this timeline, the Four Kings managed to resist the dark influence initially. So, the story could focus on how they fought against the encroaching darkness and what measures they took. It could also involve alliances with other characters from the Dark Souls universe that we don't usually see them associated with.
One idea could be a crossover with 'The Lord of the Rings'. Picture the Dark Souls characters in Middle - earth, facing off against orcs and other dark creatures. Another could be a crossover with 'Bloodborne'. The gothic and nightmarish settings of both could blend well, with hunters and Dark Souls' warriors teaming up against a greater evil. A third idea might be a crossover with 'Final Fantasy'. The different magic systems and character classes could create really unique and exciting storylines.
A crossover with 'Final Fantasy' would be cool. The magic systems in both could be combined in interesting ways. For example, a Dark Souls 2 mage could learn some spells from a Final Fantasy character. Also, a crossover with 'The Elder Scrolls' series. The vast open worlds of both could create an amazing setting for the fanfiction. The character could explore different regions of Tamriel and use their Dark Souls 2 abilities to survive.
One idea could be exploring Yorshka's origin in more depth. Maybe she has a hidden past that involves a powerful being from another realm. Another plot could revolve around her relationship with the player character. For example, they form an unexpected alliance to face a common threat in the Dark Souls 3 world. A third plot idea could be that Yorshka discovers a long - lost power within herself that changes the balance of power in the game's universe.
A more emotional fanfiction could focus on the relationship between the Fire Keeper and the Ashen One. What if the Fire Keeper develops feelings for the Ashen One that are more than just her duty - bound connection? This could lead to a complex and interesting story, with her having to balance her emotions with her important role.
A possible plot could involve an OC who is a healer with a mysterious past. They find themselves in the middle of the Dark Souls' dark and dangerous world. They start out trying to simply survive but soon realize that they have a greater purpose. Their healing powers attract both the good and the bad, and they must decide who to trust as they navigate through the complex politics and battles of the game's world.
A powerful mage could be a great main character. They could use their magic to either combat the Four Kings or try to understand the source of their corruption. Magic in the Dark Souls world is often mysterious and having a mage as the main character could allow for exploration of different spells and magical concepts in relation to the Four Kings.
One plot idea could be the Fire Keeper's journey to discover her true origin. Maybe she starts having strange dreams that lead her to explore forgotten areas of the game's world. Another could be a love story between the Fire Keeper and an unnamed warrior. They meet during the warrior's journey to link the fire and gradually fall in love, but their love is tested by the harsh realities of the Dark Souls universe. A third idea is that the Fire Keeper gains the ability to see the future and tries to change the fate of the world, which goes against the natural order of things in Dark Souls 3.
One idea could be that the characters from RWBY are transported into the Dark Souls universe. They have to adapt to the harsh and unforgiving world, facing the difficult enemies and complex level designs. For example, Ruby could use her scythe skills in the Dark Souls combat system, but find that the enemies are much more resilient than the Grimm she's used to.
One idea could be exploring the origin of the Age of Fire from the perspective of an unknown character. Maybe a commoner who witnesses the first spark of the Age of Fire and their journey to understand its significance.
One plot idea could be exploring Priscilla's origin in more depth. Maybe she has a hidden past that involves other powerful beings in the Dark Souls universe. Another idea is a story where a character befriends Priscilla and tries to protect her from those who would harm her for her unique nature. A third could be a time - travel fanfiction where a character goes back in time to prevent Priscilla's isolation in the painting world.