These are typically 2D illustrations with a transparent background that "react" to the creator's voice, blinking or moving their mouth while they speak.
Where did you come across the filename "LittleLi4.PNG"—was it on a or a social media art post ?
"Little PNG" is frequently used on social media to describe children or cultural stories from Papua New Guinea (PNG) , such as the inspiring story of Yalinu Poya , who grew up in the country and became a world-renowned chemist.