I would say the little drop of rain is the central character. But depending on how the story is told, there could be other elements that play important roles too, like the cloud that the drop came from. It could be seen as a kind of 'parent' figure to the drop. And also the ground or the body of water where the drop finally lands could be considered important characters in a sense as they are the destination of the drop's journey.
The main character is obviously the little drop of rain itself. It's the one whose journey we follow throughout the story.
The moral could be that even the smallest things can have a big impact. Just like a little drop of rain might seem insignificant on its own, but when combined with other drops, it can form a large puddle or contribute to a greater water source.
The main character is the Lemon Drop Kid.
Since I'm not familiar with the story, it might be the owner of the bakery as a main character. There could also be regular customers who played an important role in the story, like the first customer who gave great feedback and helped spread the word about the bakery.
In the 'rain man story', the most important characters are Raymond and Charlie. Raymond, being autistic, is the one with the extraordinary skills. He can recall vast amounts of information related to numbers and is extremely talented in mental arithmetic. Charlie, on the other hand, is a rather complex character. He has his own life, his own problems, and initially approaches Raymond with a somewhat self - serving motive. But as time passes, their relationship changes, and Charlie becomes more empathetic towards Raymond, and they both grow in different ways through their interactions.
The main characters are two brothers. One is an autistic savant, often referred to as the Rain Man, and the other is his younger brother who is more worldly but initially self - centered.
I'm not sure as I don't have specific information about this 'Secret of Rain Story'. It could be a story about a young scientist who is researching the rain cycle, so the main character would be the scientist.
The woman is the most prominent character. She is the one experiencing different emotions like boredom, a sense of emptiness, and a desire to do something kind like rescuing the cat. And of course, the cat is also a main character. It is the focus of the woman's attention and represents something more than just an animal in the rain for her.
I don't know specifically as I haven't read it. But in Lehane's novels, there are often complex and morally ambiguous characters.
Since the title has the idea of 'a drop in the ocean', the main characters might be ordinary people who find themselves in extraordinary situations. Maybe it's a family of sailors who feel small against the might of the ocean. Or it could be a writer who comes to a seaside town to find inspiration and discovers that his or her presence there is like a drop in the ocean of the town's rich history and complex social fabric.
The most prominent character is surely the Lemon Drop Kid. However, there could be side characters like the people he meets in his daily life. It could be a shopkeeper he has to deal with, or a friend or acquaintance who either helps or hinders him in his adventures. There might also be some antagonists in the story, like people who are after what he has or who don't like his ways, but we can't be sure without reading the story.