Rin and Shiemi are main characters involved in a potential love story. Rin is the son of Satan, with a wild and passionate personality, and Shiemi is a kind - hearted girl with a connection to the world of exorcism. Their interactions often carry a romantic undertone.
Yukio, Rin's twin brother, could also be part of a love story. He is a more reserved character compared to Rin. His relationship with other characters, such as Izumo, might develop into a love story as they both face the same challenges in the world of exorcism and have to deal with their own personal demons, both literally and figuratively.
Well, it could be the young heir of a noble family. He might be involved in a love story, perhaps with a girl from a neighboring but less prominent family. Their love story would be filled with the drama of trying to maintain their relationship while also dealing with the politics of their families.
Rin Okumura is one of the main characters. He is the son of Satan and has the power of a demon, but he wants to become an exorcist to fight against his father's kind.
One interesting love story could be between Rin and Shiemi. Their relationship starts off as friends but there are hints of deeper feelings. Shiemi is often shy around Rin, and Rin is protective of her. For example, when they face demons together, Rin is always quick to ensure Shiemi's safety.
For sure, Mary Crawley and Matthew Crawley are key in one of the main love stories. Then there's Edith Crawley, who has her own love story with Bertie Pelham. Edith was often overlooked in comparison to Mary, but her love story was quite touching. And of course, we can't forget Anna Smith and John Bates. Their love was constantly under threat from various external factors.
Horatio Caine could potentially be involved in a love story. His strong and mysterious personality might attract someone in the CSI Miami world. He is a leader, and his charisma could draw a fellow colleague or someone related to a case towards him.
Perhaps there are other characters like the heroes or heroines who interact with the Blue Fangs in their love stories. It could be a vampire hunter who falls in love with a Blue Fang, or vice versa. There might also be some sort of magical beings that play a role in either facilitating or hindering their love stories.
Sasuke is also commonly involved. His rivalry with Naruto can be further explored when blue fire is added to the mix. He might try to master the blue fire himself or be in conflict with Naruto over the power it represents.
Well, Ryoma Echizen is a main character who might be involved in some potential love - story - like situations. His popularity among the fangirls can be seen as a part of it. The fangirls' love for him is a recurring element.
Since I don't know the exact 'Blue Love Story', I can't say for sure who the main characters are. It could be a boy and a girl, or perhaps two people of any gender.
Rin Okumura could be the main character in a reincarnation fanfic. He could be reincarnated with a new mission or with some enhanced powers. His reincarnation could be a way to correct the mistakes of his past life or to face a new and greater threat.