Eren Yeager is often involved. Since he has the ability to transform into a Titan, in technology - centered fanfics, he might be the subject of experiments to better understand his Titan - shifting capabilities and how it can be harnessed with technology. Mikasa Ackerman is also common. Her combat skills could be enhanced with new technology, like a high - tech version of her signature scarf that has defensive or offensive capabilities. Armin Arlert, with his strategic mind, could be involved in developing new technological strategies to fight Titans.
Often, you'll find the main characters from the original Attack on Titan series like Eren, Mikasa, and Armin making appearances in 'Attack on Titan Gamer Fanfiction'. But there are also new characters who are gamers themselves. These new characters usually have some special gaming - related abilities or knowledge that they bring into the Attack on Titan world. For example, a character who is an expert in first - person shooter games might have amazing aim when using the ODM gear in the fanfiction.
Armin could also be a main character. His intelligence and strategic thinking would play a role if Sakura is involved in the fight. He might be the one to figure out how to best utilize Sakura's unique skills and abilities in the battles against the Titans, and they could form a friendship based on mutual respect for each other's capabilities.
It could be the kittens themselves. Maybe there's a lead kitten that has special abilities or a unique backstory related to the Attack on Titan world. For example, it could be a kitten that was experimented on by the same people who created the titans.
Naruto is often involved as he is the main character of the series. His actions and adventures are central to most fanfictions, so if there's a heart attack situation, it's likely to somehow be related to him. For instance, he might be the one experiencing the heart attack or trying to save someone who has one.
Well, it's likely that Eren would still be one of the main characters. After all, he's a central figure in the original 'Attack on Titan' story. He might be the one most affected by seeing the future and could play a crucial role in trying to change it.
Eren could definitely be a main character. He could use his Titan -shifting abilities in a unique way during the Halloween - themed events. Maybe he discovers a new power related to the spooky atmosphere. Mikasa would also be a great main character. She could be protecting Eren and the others from any unexpected threats that come with the Halloween setting.
Luna Lovegood could be a main character as well. Given her unique perspective on the wizarding world, she might have an unexpected way of dealing with Dementors. Maybe she can communicate with some otherworldly creatures that are natural enemies of Dementors and enlist their help during an attack.
Naruto is often involved. Since he's the main protagonist, writers like to put him in situations where he has to deal with deception, either being deceived or trying to deceive the enemy. Sasuke is also a common character in such fanfics. His complex personality and his past actions make him a great target for deception plots or a character who could be doing the deceiving.
Ben is obviously the main character as it's a 'ben 10' related fanfic. His various alien forms are also important characters in a sense. For example, Upgrade might be involved if the story has to do with his feet being able to attach to and control machinery in a unique way related to his feet. Gwen could also be a part of the story, perhaps helping Ben understand some strange phenomenon related to his alien feet forms.
Kakashi can also be involved in some shukaku naruto fanfic. He could be Naruto's mentor in understanding the Shukaku better. He has a wealth of knowledge about the ninja world and could offer advice to Naruto on how to handle the power of the Shukaku and any potential risks associated with it.