Solaire from Dark Souls and the Hunter from Bloodborne could make an interesting pair. Solaire is known for his sunny disposition and quest for his own sun, while the Hunter is all about the hunt in the dark and gothic world of Bloodborne. Their different outlooks and skills could lead to some great character development as they face challenges together.
Artorias from Dark Souls and Gehrman from Bloodborne. Artorias is a valiant knight, while Gehrman is the first hunter. Artorias' sense of honor and his battle skills could contrast with Gehrman's more worldly and perhaps more jaded view. They could team up against a common enemy that threatens both their worlds, and in the process, their different fighting styles and ways of thinking could create an engaging dynamic.
The Nameless King from Dark Souls and Lady Maria from Bloodborne. The Nameless King has his connection to dragons and his complex backstory in Dark Souls. Lady Maria is a skilled hunter with her own secrets in Bloodborne. Their encounter could be full of tension, as they both have strong wills and unique powers. They might initially be at odds due to their different worlds' values but could learn from each other.
One interesting concept could be the merging of the unique combat mechanics. For example, Dark Souls' methodical and strategic combat combined with Bloodborne's faster, more aggressive style. Maybe in the fanfiction, a character from Dark Souls has to adapt to the more blood - thirsty and fast - paced battles of Bloodborne's world.
I think Makoto Niijima from Persona 5 and Rin Tohsaka from Fate Stay Night would be a great pairing. Makoto is a strong - willed student council president, and Rin is a powerful mage. Their meeting could result in some intense discussions about leadership, power, and the use of their respective abilities. Plus, they both have a no - nonsense attitude which could lead to some interesting clashes and cooperation.
Gascoigne from Bloodborne and Jon Snow would make for an interesting duo. Gascoigne is a fierce hunter, and Jon Snow is a great warrior. They could fight side by side against the White Walkers. Gascoigne's experience in hunting monstrous creatures could be invaluable in the fight against the undead, and Jon Snow's leadership skills could help in coordinating their efforts.
The Ashen One would be really interesting. They are a resilient and battle - hardened character. In Game of Thrones, they would be like a mysterious force. Their combat skills and ability to face all kinds of terrifying enemies in Dark Souls would make them a formidable presence in the political and war - torn landscape of Westeros. They could potentially be a wild card in the power struggles between the houses.
I think Ruby and the Chosen Undead would be a great pairing. Ruby is young and full of energy and idealism, while the Chosen Undead has seen so much and is a battle - hardened veteran. Their interactions could be really interesting as Ruby learns about the harsh reality of the Dark Souls world from the Chosen Undead.
Sinister characters like Adam Taurus from RWBY could also be interesting in a Bloodborne crossover. His already dark and violent nature could be enhanced in the Bloodborne setting. He could form alliances with some of the more sinister forces in Bloodborne, or perhaps he becomes a sort of anti - hero, fighting against the greater evils in the Bloodborne world while still being a morally ambiguous figure.
Ladybug would be very interesting. Her positive and creative approach in Miraculous Ladybug would contrast greatly with the dark and gloomy world of Dark Souls. She could bring a new perspective to the problems and challenges in the Dark Souls world. Her ability to think on her feet and come up with solutions using her Lucky Charm would be fascinating to explore in a world full of death and despair.
Rin Tohsaka from Fate Stay Night and Astolfo from Fate Apocrypha. Rin is a serious and intelligent mage, while Astolfo is a carefree and somewhat eccentric Servant. The combination of Rin's no - nonsense attitude and Astolfo's wacky behavior would make for some really interesting and humorous exchanges.
Kakyoin and Loki Warframe would make a fascinating pair. Kakyoin is very intelligent and strategic with his Hierophant Green stand. Loki, on the other hand, is all about stealth and deception. They could combine their skills to infiltrate enemy bases in the crossover. Kakyoin could use Hierophant Green to scout ahead while Loki keeps them hidden from detection.
Tsukune and a powerful mage from the other fandom could be an interesting pair. Tsukune's vampiric powers combined with the mage's magic could create some really cool combat scenes and an interesting dynamic as they learn from each other.