A really interesting fanfic could involve time travel to the time of the Vikings in Assassin's Creed Valhalla. The character could be from a modern Assassin's cell and accidentally get sent back in time. There, they would have to learn the ways of the Norse Assassins and fight against the Templars who are trying to influence the Viking raids in ways that would benefit their future plans.
Another possibility is a time travel where the character goes to the era of Ezio Auditore but as an outsider. They might have to adapt to the Renaissance setting quickly while also trying to figure out how their presence could potentially change the events that Ezio is a part of. Maybe they are there to prevent a Templar plot that was never fully explored in the original games.
First, decide on the time period you want your character to travel to. It could be one of the well - known eras from the Assassin's Creed games like the Crusades or the Renaissance. Then, create a character with a clear motivation for time traveling. For example, they might be trying to prevent a Templar - related disaster in the past. Next, research the historical setting thoroughly so that you can accurately describe the environment, culture, and people. Don't forget to include elements of the Assassin's Creed lore, such as the hidden blade and the conflict between Assassins and Templars. Also, think about how time travel might affect the character's personality and beliefs as they experience different times and cultures.
In a way, Assassin's Creed is a time travel story. Players get to experience various eras and interact with historical figures and events, which gives the feeling of traveling through time.
Well, a cool plot idea might be the character time - traveling and accidentally bringing a modern - day weapon with them. They then have to figure out how to use it without disrupting the historical timeline too much. Or perhaps they travel to a time when the Isu, the precursor race in Assassin's Creed, were more active and interact with them. This could lead to uncovering lost technology or knowledge.
Maybe an Assassin travels back to the time of the Roman Empire. They could interact with famous Assassins from that era and together face a new, time - traveling Templar threat that's trying to rewrite history for the Templars' benefit. This would involve a lot of action in the ancient Roman setting, with the Assassin having to blend in and also use their modern combat techniques sparingly so as not to arouse suspicion.
One common theme is probably the exploration of different historical periods. Giovanni gets to experience times he otherwise wouldn't, like maybe the Middle Ages or the Renaissance in a different light.
One idea could be to have a character from the Assassin's Creed world end up in the Naruto universe. For example, an Assassin could be sent on a mission that somehow transports them to Konoha. They would have to adapt to the new world with its unique chakra system while still relying on their assassin skills like stealth and parkour. This could lead to interesting interactions with Naruto and his friends as they try to figure out where this strange newcomer is from.
Another angle for a fanfic about Xenia could be her relationship with the protagonist. Perhaps they form an unlikely alliance based on mutual respect and a common goal. They could learn from each other's skills and experiences, and this could lead to a strong bond between them as they journey through the game's world together.
To incorporate time travel realistically, it should follow some rules. For example, the character could use a Piece of Eden or some other ancient artifact as a time - traveling device. And there should be limitations, like it can only be used at certain times or places. Also, when they travel, they should face consequences for changing the past, like creating alternate timelines.
One idea could be a story where Kassandra, during one of her adventures, stumbles upon a mysterious portal that leads her to the Underworld. There, she meets Hades. Hades is initially suspicious of her but soon realizes she has no ill intent. They could form an unlikely alliance to deal with a threat that endangers both the mortal world and the Underworld.
One idea could be to explore the backstory of a minor character in the game. For example, a nameless assassin who has a unique skill but was never fully developed in the official story. Another could be to create an alternate timeline where the Templars and Assassins form an alliance against a greater threat.