20

20 made its first appearance in Soldier Traces His Final Dispenser, but is more known as being one of the main characters in Heavy Is 20. It is an entity that possesses Heavies by replacing their heads with its signature yellow, circular road sign. 20 appears to be the antagonist of the animation, being the reason for the animation's sensory overload in the first place. The fedora-wearing Heavy it possesses is an innocent bystander to the chaotic story. The road sign has "20" printed on it in black and has a red border around the edge of the sign. 20 is seen interacting with 30, another member of the road sign species, and Ol' Geezer Engineer during the course of the animation. 20 is forcibly and irreversibly removed from the fedora-wearing Heavy by Team Captain Soldier by the end of the animation.

Soldier Traces His Final Dispenser
20 briefly appears in the animation by possessing Hospital Heavy. However, instead of causing chaos, it appears to grant Soldier with some level of power and even offers him a ride out of the hospital and into a Demoman. 20's road sign is seen on Soldier's back after the Demoman teleports him, and strangely turns into 30's road sign.