One aspect to consider in this fanfiction could be the power dynamics. If Yuichiro is dominant, it might lead to interesting character interactions with Mikaela. For example, Yuichiro could be the one making decisions in their adventures together, while Mikaela might play a more supportive role. It also adds an element of tension and drama to their relationship, as the dominant - submissive dynamic can create various scenarios for character growth and conflict.
In this type of fanfiction, the theme of power and its implications is likely. Yuichiro's dominance represents a certain kind of power. How he wields this power in relation to Mikaela and the world around them can be a theme. Another theme could be the exploration of boundaries. Both characters may need to figure out the boundaries within their relationship due to Yuichiro's dominance. And finally, the theme of sacrifice might come into play. Yuichiro might be more likely to sacrifice for Mikaela because of his dominant position, and vice versa.
One possible fanfiction could be about Sam and Mikaela starting a family. Maybe they find an abandoned Autobot baby. Sam, with his experience with the Autobots, wants to take it in and Mikaela is initially hesitant but is won over by the baby's cute beeps and whirs. They then face the challenge of raising a baby that has unique robotic needs while also trying to keep it a secret from the world.
She is usually very intelligent. This allows her to solve complex problems and outwit her enemies in the stories. For instance, in some novels, she uses her intelligence to break through difficult mazes or decipher ancient codes. Moreover, Mikaela is often shown to be kind - hearted. She cares about the people around her and is always willing to help those in need, which makes her a very likable character in the light novels.
One common theme is the deep emotional bond between them. Given their relationship in the original work, fanfictions often explore how they support and care for each other on a more profound level. Another theme could be adventure, where they go on quests together and their relationship develops during those experiences.
I'm not that familiar with 'yuichiro hyakyua' crossover fanfiction, but often in crossovers, themes like friendship between characters from different worlds can be common. Maybe also the exploration of different powers or abilities when the characters interact.
Survival is also a big theme. When he is in a crossover with a more dangerous world, like a post - apocalyptic or a world full of powerful enemies, Yuichiro has to use his skills and wits to stay alive. It creates a lot of tense and exciting moments in the fanfiction.
I'm not sure specifically about 'yuichiro hyakyua' crossover fanfiction. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net. They usually have a wide range of crossover fanfics.
The 'seraph of the end mikaela novel' is centered around a world that has been turned upside down by vampires. Mikaela is an important figure in this story. The plot is full of action - packed scenes. There are battles between humans and vampires, and Mikaela is often in the middle of these conflicts. His story is intertwined with themes of friendship, betrayal, and the fight for freedom. As the story progresses, we see how Mikaela's past experiences shape his actions and decisions in the present. His relationships with other characters, both human and vampire, add depth to the plot, and the overarching goal of the characters to change the status quo in this vampire - dominated world drives the narrative forward.
I don't know the details of this particular novel, but generally, cities in vampire novels are often described as having a sense of mystery. There might be dark alleys, old buildings with lots of shadows where vampires can hide.