Here is the second part of my summary I really need you to revise. Thank you.

1) Details of the behaviour, clothes and so on of the characters are part of the social setting of the story.
Characters are the people who appear in a novel and represent the most important ingredient of the world of fiction.
2) The presentation of a character can be direct, when the writer gives the character’s personality and appearance through description (when the writer tells the reader of the character’s personality and appearance) –or indirect – when the reader has to infer the features of a (the) character from his/her interaction with other characters, feelings and thoughts.
3) Depending on their role in the story there can be major and minor characters. A further distinction should be made between round and flat characters.
4) The former are built around a single psychological trait; they are easy to recognize and they are static, that is they do not develop in the course of the action.
5) They are minor characters that can be used to create a particular atmosphere inside a complex narrative frame. The latter change their personality as the narration develops and can even influence the plot.

1) Details of the characters' behaviour, clothing, dialogue, and so on, are part of the social setting of the story.

Characters are the people who appear in a novel and represent the most important ingredient of the world of fiction.

2) The presentation of a character can be direct, when the writer overtly tells the readers about the character’s personality and appearance through description – or indirect, when the reader has to infer the features of a character from his/her interaction with other characters, as well as by his/her feelings, words, and thoughts.

3) OK

4) The former change their personalities as the narration develops, and they can even influence the plot.

The latter are built around a single psychological trait; they are easy to recognize and they are static; that is, they do not develop in the course of the action.

5) Minor characters can be used to create a particular atmosphere inside a complex narrative frame.

"former" = major characters, according to your sentence 3.
"latter" = minor characters, according to your sentence 3.

Here is the revised version of your summary:

1) The details regarding the behavior, clothing, and other aspects of the characters contribute to the social setting of the story. Characters play a crucial role in storytelling as they are the individuals who appear in a novel and represent the most significant element of the fictional world.

2) The presentation of a character can be direct, where the writer explicitly describes the character's personality and appearance to the reader. Alternatively, it can be indirect, requiring the reader to infer the character's traits based on their interactions with other characters, emotions, and thoughts.

3) Characters can be categorized as major or minor based on their role in the story. Additionally, they can be further classified as round or flat characters.

4) Round characters are constructed around a single psychological trait and are relatively easy to identify. They tend to remain static throughout the narrative, without much personal growth or development.

5) On the other hand, flat characters are minor characters that contribute to creating a specific atmosphere within a complex narrative structure. They may change and evolve in their personality as the story progresses and can even influence the plot itself.