DogDay is one of the Smiling Critters, the toy-like animal characters introduced in Poppy Playtime Chapter 3, where he is presented as the group's warm and loyal dog leader. Online, short voice clips of the character have been reused far beyond the game itself, especially in short-form videos, edits, and soundboards where a familiar, cheerful character sounding sad creates an instant contrast. That contrast is why the clip keeps circulating: viewers recognise DogDay immediately, so the sadness lands without any setup.