This is Sans, a character from the popular RPG game Undertale, which was launched by indie game developer Toby Fox in 2015.

The model uses a single-nozzle 3D printer to print with purple PLA filament, and switches to a luminous PLA material at the beginning of the character's head.

"Sans" and "Undertale" are owned by their respective owners. For more information about the game "Undertale", please visit undertale(dot)com.