One common theme could be rivalry. Since it's 'akira vs yu', there's likely to be a sense of competition between them, whether it's in a sport, a game, or some other area.
Finding a great 'akira vs yu fanfic' can be a bit of a hunt. You might want to check out the reviews and ratings on fanfic sites. Also, consider joining relevant fan communities. People there often share their favorite fanfics. For example, there could be a forum dedicated to works related to Akira and Yu. By interacting with other fans, you increase your chances of finding a high - quality 'akira vs yu fanfic'.
One common theme is the exploration of Akira's powers. Writers often like to expand on what he can do and how his powers could be used in different situations.
One common theme is the clash of different power systems. For example, when Akira is crossed over with other anime that have unique powers, like in 'Akira vs. One Piece', the powerful psychic abilities of Akira's characters are pitted against the Devil Fruits and Haki in One Piece. This creates intense battles and interesting power dynamics.
One common theme is friendship. Just like in the original Naruto series, akira often forms strong bonds with other characters. For example, akira might befriend Naruto and they support each other through tough times.
One common theme is self - discovery. Akira often has to re - evaluate who he is when thrust into a new, crossover world. Another theme is the clash of different cultures or power systems from the two (or more) universes involved.
Growth is also a prevalent theme. Both characters grow as individuals as they interact with each other. For example, they might learn new skills or gain more confidence. Additionally, loyalty is often seen in these fanfics. They stay true to each other no matter what challenges come their way.
One common theme is friendship development. Their relationship might start as just acquaintances and gradually grow into a deep and meaningful friendship.
One common theme is friendship evolving into love. In many akira x shiki fanfic, they start as friends or comrades and gradually realize they have deeper feelings for each other.
Love, either platonic or romantic, is also a frequent theme. Some fanfics focus on the deep emotional connection between them, showing how they care for each other in a loving way, which could be a strong friendship or a budding romance.
Since I'm not familiar with specific 'akira x ann lemon fanfic', it's hard to say. But generally in fanfics, common themes could be friendship, adventure, or solving mysteries together if they are in a story with an action - packed plot.