Whos are fictional characters from the popular children's book series created by Dr. Seuss, particularly featured in "Horton Hears a Who!" and "How the Grinch Stole Christmas!" They are small, whimsical beings who live in the microscopic town of Whoville. The Whos are known for their cheerful nature and distinctive, quirky appearances. In the story, the Whos are portrayed as a community that values friendship and togetherness. Their famous phrase, "We are here! We are here!" emphasizes their desire to be heard and recognized. The Whos symbolize the importance of every individual, no matter how small, in making a difference in the world.