I'm not sure as I haven't read the novel specifically. But usually, there would be the two lovers at the center of the 'tainted love' situation. Maybe one of them is a character who has some sort of past or secret that taints the relationship.
A 'tainted web novel' could refer to a web - based novel that has been corrupted in some way. Maybe it contains inappropriate or unethical content, like excessive violence, discrimination, or false information. However, the term is rather broad and can be interpreted differently depending on the context.
In American Horror Story, 'tainted love' can manifest in characters in various ways. One way is through the form of codependency. Characters may stay in toxic relationships because they think it's love, but in reality, it's a warped sense of attachment. Another way is through revenge - based love. A character might fall in love with someone they initially wanted to harm out of a sense of power play, and this love is clearly tainted by their initial malicious intent.
There's an astronomer in 'Nightfall' who plays a crucial role. He's the one who discovers and tries to warn others about the coming nightfall. Another important character could be the religious leaders. They have a certain view of the world based on the constant light, and their reactions to the idea of nightfall are significant in the story.
Well, one popular type of character is the scientist - adventurer. These characters use their scientific knowledge to solve problems and uncover secrets. For example, Dr. Sarah in Isaac's works is constantly making new discoveries. There are also the rebel characters who fight against oppressive systems. They are often the ones who inspire change in the fictional universes. Another type is the artificial intelligence characters. Some are friendly helpers, while others turn out to be the antagonists due to glitches or malicious programming.
I'm not entirely sure as I haven't read the story lately. But typically in Asimov's works, the main characters are often intelligent, inquisitive individuals. In 'Youth', they might be young people with a thirst for knowledge or adventure.
In the Isaac story, there are several key characters. Isaac is at the center. His father Abraham is a major figure as he was the one who received the command to sacrifice Isaac. Sarah, Isaac's mother, is also important as she was part of the story of Isaac's birth. And Rebekah, Isaac's wife, is a main character too because she was brought into Isaac's life to continue his family line.