The main character is most likely the person who is leaving the notes in the bottle. They are the one through whose perspective we see the events of the story unfold. There might also be other characters who are only mentioned briefly, like people from the narrator's past or those in the situation that led to the notes being written.
In 'Notes from a Bottle' short story, the main character is the one who is documenting their experiences in the form of notes. This character is probably in a unique situation, perhaps stranded or in a place of great change. There could be secondary characters that are alluded to, for example, those who the narrator wishes to communicate with through the notes, but the focus remains on the note - writing character.
One of the main themes could be isolation. The narrator in the story might be isolated in some way, perhaps physically as if marooned. Another theme could be survival, dealing with the situation at hand. And also, there might be a sense of self - discovery during the events in the story.
I don't know the 'the bottle short story' well enough to say for sure, but it could be a lonely fisherman who discovers the bottle and a mysterious figure whose message is in the bottle.
Typically, the main character is the person who finds the bottle, like a young adventurer or an ordinary person going about their day. And of course, the genie is also a main character. The genie is the one with the magical power to grant wishes and often has a personality of its own, sometimes being mischievous or wise.
There is usually a person who first gets the bottle imp. This character is often someone who is either in need or is greedy for power or wealth.
The main characters usually include the person who writes the message and puts it in the bottle. This character is likely to be in some sort of difficult or isolated situation. The other main character is the one who finds the bottle. They could be from a completely different background. For example, the sender could be a marooned pirate and the finder a young scientist exploring the shore. Their encounter through the bottle forms the core of the story.
The main characters are usually the person who finds the bottle and the genie inside it.
The main characters include the initial finder of the bottle. This person stumbles upon the strange bottle with the imp inside. Then, of course, the imp which is a very important character as it controls the power of the bottle and sets the rules for its use. Additionally, all those who get involved in the buying and selling of the bottle are main characters. They each face the difficult situation of trying to sell the bottle while using its magic to their advantage.
Well, the main character is likely the first person who comes into possession of the bottle with the imp. Then there are probably other characters who the bottle is passed on to. These could be people who are either greedy and see the opportunity for wishes or are desperate and willing to take the risk of the bottle's curse. However, without a more in - depth read of the 'the bottle imp full story', it's hard to name specific characters.
There could be a mermaid and a bottle. The mermaid finds a bottle floating in the ocean. Inside the bottle is a love letter from a human on land. The mermaid is fascinated by this letter and decides to find the person who wrote it. So the mermaid and the bottle start this journey together. The bottle serves as a guide and a connection to the human world, and the story could be about the mermaid's search for love across the boundaries of two different worlds.
The main characters are usually the person who finds the bottle and the genie inside the bottle.