I'm afraid I can't determine the main characters in 'black or white original story' without more details. However, if it's a story about race relations, the main characters might be from different racial backgrounds, one being black and the other white, and the story could revolve around their interactions, experiences, and how they deal with the social constructs around their races.
The main characters are Ciel Phantomhive and Sebastian Michaelis. Ciel is a young earl who is determined to avenge his family's death. Sebastian is a demon who has made a contract with Ciel to serve him until he has achieved his revenge and then claim his soul.
In the 'Woman in Black' original story, Arthur Kipps is the central human character. He is a young lawyer. Then there's the titular woman in black. She is a ghostly figure. There are also some of the villagers who play important roles as they either have knowledge of the woman in black's legend or are affected by her presence. For instance, some of the older villagers might have seen her before and can give Arthur some clues about her, but they are also very fearful of her.
I'm not entirely sure about all the main characters in 'the black cauldron original story' but there must be a hero figure who is against the evil of the black cauldron. There might also be a villain who wants to use the cauldron for his own dark purposes.
The main character is T'Challa. He is the Black Panther, the king and protector of Wakanda. Another important character is Erik Killmonger. He is a complex antagonist who has a claim to the Wakandan throne and challenges T'Challa's rule. There's also Okoye, the leader of the Dora Milaje, Wakanda's all - female special forces, who is fiercely loyal to T'Challa and Wakanda.
The main character in the 'the black fairy original story' is the black fairy. Other possible main characters could be an elder fairy who acts as a mentor or antagonist to the black fairy. There may also be a group of forest spirits that the black fairy interacts with. These characters together would form the core of the story, with their relationships and interactions driving the plot forward.
Shuri is one of the main characters. She plays a significant role after T'Challa's death. Also, Queen Ramonda is important as she has to lead Wakanda during this difficult time.
The main character is Arthur Kipps, a young solicitor. And of course, the titular woman in black is also a very important character as she is the source of all the mystery and horror in the story.
In the 'Black Phone' original story, the central character is the boy who is abducted. He is the one who has to face the terrifying situation and try to escape. Then there are the voices of the past victims. These voices play a crucial role as they are the ones providing the boy with the information he needs to break free. There's also the kidnapper, who is the main antagonist in the story, but he is more of a menacing presence in the background while the boy and the voices are the focus.