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.
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.
Well, one interesting aspect could be the unique crossovers. Combining the intense world of Attack on Titan with the cuteness of kittens creates a really fun contrast. It might also introduce new character dynamics, like how the kittens interact with the titans or the Survey Corps members.
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.
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 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.
Armin could also be a main character in such a fanfic. He's known for his intelligence. As a permanent titan, he could use his smarts in unique ways. He might try to figure out the secrets of the titan form from the inside and communicate with the other characters in unexpected ways. For example, he could leave clues or messages for his friends using his titan abilities.
The main characters include Eren Yeager. He is a very important character with his determination to fight the Titans. Mikasa Ackerman is also a main character, known for her great combat skills and her loyalty to Eren. Armin Arlert is another key character, being intelligent and often coming up with strategies against the Titans.
Eren might still be one of the main characters. Since he is such a central figure in the main series, it's likely he plays an important role in the short story as well, perhaps in a different situation or with a new aspect of his character explored.
Mikasa Ackerman is another important character. She is highly skilled in combat and is very protective of Eren. Her loyalty to Eren is a significant part of her character.
Obviously, Eren as a baby is the central character. But we can also expect to see his family members like his father, Grisha. His mother, Carla, would also be an important presence as she plays a significant role in Eren's early life.