This is a type of outfit or transformation result, that leads to the body being completely covered in some kind of smooth material. The most recognizable part, here, is the absence of any real facial features. The head just appears as some kind of ovoid, and it can’t really be determined what the person under the hood, or the entity itself, is thinking. Probably the artist, who makes most use of this concept, is RubberMatt. This entire concept really gained popularity through the Eudeamon story by Evil-Dolly.