Ezio Auditore from 'Assassin's Creed' would be a great choice. Both are masters of stealth and combat in their respective worlds. They could compare their different techniques, for example, Ezio's use of the hidden blade and free - running skills against Corvo's supernatural abilities like possession and his sword - fighting skills. Their meeting could be set in a city full of secrets and political unrest, where they have to work together to uncover a conspiracy.
John Wick could be an interesting crossover character. John is a highly skilled assassin in a modern - day, crime - filled world. If he were to cross paths with Corvo, it would be a clash of different eras and styles. Corvo's more magical and otherworldly skills would contrast with John's more straightforward, but extremely effective, gun - fighting and hand - to - hand combat skills. They could end up teaming up against a common enemy that has somehow managed to bridge their two worlds.
Sherlock Holmes could also make for an exciting crossover. Holmes' brilliant deductive skills combined with Corvo's stealth and action - oriented abilities would create an interesting dynamic. They could be solving a mystery that has both supernatural elements (which Corvo is familiar with) and complex human - related puzzles (where Holmes shines). The setting could be a Victorian - era London with a dark underbelly that only they can uncover together.
One idea could be a crossover with the 'Assassin's Creed' universe. Corvo could team up with an Assassin to take on a powerful and corrupt organization that has a hold over both their worlds. They could exchange skills, like Corvo teaching the Assassin some of his magic - such as Blink - and the Assassin showing Corvo new ways of stealth and combat with their hidden blade and acrobatic skills.
Yes, there are quite a few. You can start by looking on fanfic websites like Archive of Our Own. Just search for 'Corvo Attano x Emily' and you'll find a variety of stories, from action - filled adventures to more emotional character - study type fanfics.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can easily search for 'Corvo Attano Outsider Fanfic' there. There are often filters to help you find the most relevant and highly rated ones.
The unique relationship between them. Corvo is Emily's protector, and this power dynamic can be explored in many ways in fanfics.
One interesting 'Corvo Attano Outsider Fanfic' could be the one where Corvo has to face a new threat that is somehow related to the Outsider's powers in a more complex way than in the original game. It delves deeper into the lore and his relationship with the Outsider.
Aquaman could be an interesting addition. Picture Mr. Freeze's freezing technology affecting the oceans. Aquaman has to come to the surface world to confront Mr. Freeze. They could have a battle where Aquaman uses his control over sea life and Mr. Freeze uses his cold - based weaponry. It would be a clash of two very different powers.
Link from The Legend of Zelda series could be a great partner for Ryu Hayabusa. Link has his trusty sword and shield, and his ability to solve puzzles and traverse different terrains. Ryu Hayabusa's ninja skills would blend well with Link's adventuring spirit. They could be on a quest to rescue Zelda, who has been kidnapped by some dark force that also threatens Ryu Hayabusa's homeland. Their combined skills would make for an exciting story as they face various enemies and challenges along the way.
If it was a crossover with the Lord of the Rings, Aragorn could be paired with Darth Vader. Aragorn is a noble and skilled warrior, and his leadership skills would contrast with Vader's tyrannical rule. They could start as enemies, but as they learn more about each other's worlds and the threats they face, they might form an uneasy alliance to defeat a greater evil.
Superman from the DC universe. Superman stands for truth, justice, and the American way, but his methods are often more lenient compared to Akainu. The two could have a philosophical debate about justice while also having to fight a common enemy.
Taylor Hebert from 'worm' and Sam Winchester from 'Supernatural' would be a great pairing. Taylor's strategic mind combined with Sam's knowledge of the supernatural could lead to some really interesting interactions and adventures.