Will is a character appearing in the DLC Countdown art (see image below).
Apperance
He is probably the character from the event in the game where you can give him either a water bottle or a soup can. Afterwards, he defends your shelter next time you don't have anything else to defend yourself with. He wears a brown sleeveless shirt, brown pants and purple sandals. He has green skin, blonde hair, and five arms.
Gallery

Community content is available under CC-BY-SA unless otherwise noted.