I think relationship dynamics could be another theme. It might show how the characters interact with each other, how they support or conflict with one another within the context of love. For example, how they communicate their feelings, deal with jealousy or insecurities. And it could also touch on the theme of personal growth. As the characters experience love, they may grow and change, learning more about themselves and what they truly want in a relationship.
Since I don't know which 'Syndrome Graphic Novel' you're referring to, I can't say for sure. But generally, the main characters could be the ones directly affected by the syndrome in the story. It could be a patient, a doctor trying to cure the syndrome, or a family member of someone with the syndrome.
Since I'm not familiar with the 'love syndrome 3 novel', I can't say for sure who the main characters are. But they might be people who are struggling with love - it could be a male character who is trying to understand his feelings for a female character, or vice versa.
I'm not sure specifically as I haven't read this particular 'syndrome a classic novel'. But generally in a classic novel, there are often protagonists who drive the story forward. They could be ordinary people facing extraordinary situations, or they could be individuals with special qualities or abilities.
In some Syndrome Game Stories, the main character might be a group of friends. Each friend has their own specialty. One might be good at combat, another at finding clues, and another at communicating with different virtual species. Together, they form a strong unit to combat the syndrome that is threatening their virtual world.
Since we don't have any information about the 'love syndrome novel' other than its title, we can only guess about the main characters. Maybe it has a protagonist who is a bit of a hopeless romantic, constantly falling in love and facing the consequences. Or it could be about two people from different backgrounds who fall in love and have to overcome various obstacles. There could also be a supporting cast of family members or friends who influence the main characters' love lives in different ways.
Love Syndrome 2 was a serial novel or drama series. We know that Love Syndrome 2 is a Thai drama, probably the second work in the Love Syndrome series. However, beyond that, we are unable to obtain more specific information about Love Syndrome 2. Therefore, I don't know the details of Love Syndrome 2.
Since I haven't read the 'Asperger Syndrome A Love Story', it's difficult to say exactly who the main characters are. But it's likely that the story focuses on a couple where one or both have Asperger Syndrome. They could be two individuals from different backgrounds who come together and their relationship is shaped by the challenges and joys related to Asperger Syndrome.
I don't know as I haven't read it. But they could be patients with the 'Read Syndrome', doctors trying to treat them, or family members of those affected.