In "A Raisin in the Sun," Mrs. Johnson is a neighbor of the Younger family who visits them to dissuade them from moving to a predominantly white neighborhood. Mrs. Johnson is against the idea of black people moving into white neighborhoods and believes that it will cause trouble and danger for the Younger family. She expresses her concern by warning Mama, the matriarch of the Younger family, about the potential danger and harassment they might face from the white residents.
Mrs. Johnson's fear and concern are evident in her tone and body language. She speaks with urgency and seriousness, warning Mama about the potential danger and trying to persuade her to change her mind. Mrs. Johnson's attitude towards the idea is negative and she makes it clear that she does not support the Youngers' decision to move to a white neighborhood.
Overall, Mrs. Johnson's reaction to the Younger family's plan to move to a white neighborhood reflects the racial tension and discrimination that existed during the time in which the play is set. Her character serves as a reminder of the challenges and obstacles that African Americans faced in their struggle for equal rights and opportunities.