A frequent theme is probably the growth of their relationship. It could start as a simple acquaintance and gradually develop into a closer bond. Also, the theme of teamwork might be present, especially considering the soccer - centric nature of Inazuma Eleven. They might work together as a team on and off the field, which could be a central part of the fanfic.
Aphrodi has some truly remarkable moments in Inazuma Eleven fanfics. There are times when he uses his charm and charisma to diffuse a tense situation within the team. Maybe there was an argument between players, and he steps in and with his words and presence, he calms everyone down. His best moments also include his show - off plays on the field, those times when he dribbles past multiple opponents with ease, leaving the crowd in awe. These moments not only highlight his soccer skills but also his character in the fanfic world.
Aphrodi is a really interesting character in Inazuma Eleven fanfics. He is often depicted as having a complex personality. His skills on the soccer field are usually a major focus, with his unique shooting techniques being a highlight. In many fanfics, his relationships with other characters, like his teammates, are explored in depth. He might be shown as a bit of an enigma at first, but as the story progresses, his true self and motives are gradually revealed.
The theme of growth is also prevalent. The players usually start off with certain limitations but through training and experiences in matches, they grow both as players and as individuals. Also, the idea of loyalty to the team is a common theme. In fanfics, players stay true to their teams even when faced with difficult situations or tempting offers from other teams. This loyalty is what helps the team stay together and succeed in the end.
Realistically, their relationship could develop through mutual respect for each other's skills. For example, if Akane is good at academics, she could help Shindou with his studies. In return, Shindou could teach her about soccer strategies. This exchange of knowledge and support would create a bond between them.
Another plot could be that Akane gets injured while trying to help the soccer team. Shindou feels responsible and takes it upon himself to take care of her. As he nurses her back to health, they spend a lot of time together and start to realize that they have more in common than they thought. This could be the start of a romantic relationship as they open up to each other about their pasts and hopes for the future.
Well, unfortunately, I haven't come across a particular 'inazuma eleven go tsurugi x kinako fanfic' myself. However, you could also join some Inazuma Eleven fan groups on social media platforms. People in those groups often share and discuss their favorite fanfics, and you might be able to find some good ones about Tsurugi and Kinako that way.
One great place to start looking for 'Inazuma Eleven Go Shindou x Kirino' fanfic is Archive of Our Own (AO3). There are many talented writers in the fandom who create interesting stories about their relationship. You can also check out fanfiction.net, although the selection might be a bit more limited compared to AO3.
One common theme is the power of love to overcome obstacles. In these fanfictions, love often helps the characters face difficulties in their soccer careers. Another theme is the discovery of new feelings. The characters might be focused on soccer at first but then suddenly find themselves falling in love.