Since we don't have more information about 'ff love story', it's hard to determine the main characters precisely. It could be two fictional characters named 'f' who are at the center of a romantic plot. Maybe one 'f' is a shy and introverted type while the other is more outgoing, and their personalities play a role in their love story.
In the full story of FF8, Squall Leonhart is the central figure. He is a complex character who grows throughout the story. Rinoa Heartilly is a key female character, she is strong - willed and gets involved with Squall. Zell Dincht, with his energetic and impulsive nature, is a memorable character. Irvine Kinneas, the marksman, adds another dimension to the group. The sorceress Edea, who is initially the antagonist, is also a very important character as her actions drive much of the plot.
In the original ff7 story, there are several main characters. Cloud Strife is the central figure, a brooding and complex hero. Aerith Gainsborough is not only a love interest for Cloud but also has a crucial role in the story's spiritual and environmental aspects. Sephiroth, with his long silver hair and terrifying power, is the main antagonist. Additionally, characters like Tifa Lockhart add depth to the story with her relationship to Cloud, and characters like Red XIII contribute to the diverse group that comes together to oppose Shinra and Sephiroth.
The main characters include Lightning. She is a strong - willed and skilled fighter. Snow is another important character. He is passionate and has his own ideas about how to deal with their situation as l'Cie. Then there is Vanille, who has a mysterious past. Sazh is also a key character. He is a father figure and brings some humanity and humor to the group.
I'm not certain as the details of FF16's love story aren't widely known yet. But usually in Final Fantasy games, the main characters in a love story are often the hero or protagonist and a female lead. They could be a knight and a princess - like character.
Alphinaud is also a main character in many FF14 short stories. He is a young but intelligent Elezen who plays a significant role in the political and strategic aspects of the stories. His sister, Alisaie, is also important. She is more impulsive and combat - oriented compared to Alphinaud, and they both contribute to different storylines. There are also various NPCs from different races that play important roles depending on the specific story, like Y'shtola from the Miqo'te race who is a powerful mage.
I'm not entirely sure who the main characters are specifically as it can vary from one manan ff story to another. But usually, there would be some central figures around which the plot revolves. It could be a group of friends or a couple that the story focuses on.
Since it's called 'ff7 first soldier story', we can assume there will be at least one main soldier character. Maybe there will be a mentor figure or a rival among the main characters as well. However, without more information, it's difficult to be more specific.