Wojak
The crudely drawn bald figure used to express an emotional state. Unlike Pepe he isn't a character but a template.
The figure appeared around 2010 on Polish and German imageboards, drawn in MS Paint by a user whose handle was Wojak — Polish for soldier. The original use paired it with the phrase "that feel when", where the image carried a quiet melancholy that the text then specified. What made it durable is how easy it is to redraw: a hat, a pair of glasses or a different mouth line is enough to create a new subtype, and each of those became a description of a kind of person rather than a feeling. Doomer, Zoomer, Boomer, NPC and Soyjak all descend from the same figure, and together they form one of the internet's most productive visual vocabularies.