I'm really cannon fodder [Quick Transmigration]

In a story, the characters that appear on the stage usually include protagonists, supporting roles, secondary characters, and cannon fodder. The protagonist is always prosperous and the cannon fodder is always miserable. Chen Yu's task is to come to those high-spirited protagonists and personally teach them what it means to not bully young people. After the N protagonist cried bitterly and hugged his thigh to repent, Chen Yu tilted his head slightly, very puzzled: " What are you talking about, I’m just a cannon fodder.” The planned world 1. Overlord, he has a white moonlight in his heart 2. There are 47 others like me 3. Miserable little cabbage once lost his memory 4. The reborn daughter wants revenge *A non-traditional slap in the face, education is greater than a slap in the face*The essence of the protagonist is an old father