The document summarizes how a character is portrayed in different parts of a teaser trailer. In the first part, the character seems polite, hardworking, and private, portraying a normal student life. However, the second part shows the character being rebellious, dangerous, fearless, and impulsive, showing an inconsistent and confused personality. This causes the audience to question which side of the character is real. The music and editing in the two parts also differs, mirroring the changing portrayal of the character.