How does MichAEl's scowls really affect the girls in the story seventh grade by Gary Soto?

Michael's scowls in the story "Seventh Grade" by Gary Soto affect the girls by making them feel nervous and self-conscious. They worry about whether they are the cause of his disapproving expression, which leads to feelings of awkwardness and insecurity around him. His scowls create tension and unease in their interactions with him.