The main character is Samara. She is the source of the horror in the story.
Well, Samara is the key character. She is the one who haunts those who watch the cursed tape. And there are also the people who accidentally watch the tape and then have to deal with the curse, like Rachel.
There's often a protagonist who is an explorer or a scientist. They are usually the ones who first encounter the strange and terrifying elements of the story.
Since I don't know the exact 'the ring story', it's hard to say. But generally, there could be a finder of the ring. Maybe a young adventurer or a curious child.
Since we don't have a lot of details about 'the ring short story', it's difficult to say exactly who the main characters are. But usually, there would be a character who discovers or owns the ring. There might also be an antagonist who wants the ring for their own purposes.
The king is the central figure in 'the ring of the king story'. There could be an antagonist, perhaps a power - hungry noble or a dark sorcerer who desires the ring. And there may be a brave knight who is loyal to the king and helps protect the ring.
The main character in the 'the ring original story' is a female investigator. She is curious about the deaths related to the videotape and gets involved in the whole cursed situation. There is also the presence of some of the victims of the videotape curse, though they are more like catalysts for the main character's investigation.
One of the main characters is the journalist who investigates the cursed videotape. There's also the character of Samara who is closely linked to the source of the horror on the tape.
The main character is often the girl who becomes the vengeful ghost. And usually, there are the victims who watch the cursed tape.
There's no way to be certain without reading it, but perhaps there's a female lead who is somehow connected to the ring. Maybe she has a special ability that is awakened by the ring, and there could be a male character who helps her on her journey with the ring. There could also be an antagonist who wants to steal the ring for their own malicious purposes.
Since I don't know the exact 'children's ring story', it's difficult to say. But it could be a child protagonist, perhaps a young boy or girl who discovers the ring. There might also be some supporting characters like their friends or family members who are involved in the story related to the ring.
I don't know the exact 'the king's ring story', but usually there would be the king himself. Maybe a princess or a prince too.