Porter "Paintergeist" Geiss is a poltergeist ghost who attends Haunted High, a school for ghosts and son of the Poltergeist. He appears in the TV special Haunted. He has been labeled several times as part of the "bad boy" type.
Porter's nickname "Paintergeist" comes from his love of art. He loves painting anything and everything, and when inspiration strikes, he wastes no time in finding the nearest canvas, usually a wall, and painting an image in ghost paint. He hates ruining other people's property, so he only paints using ghost paint, which fades away after a while. Despite this, Porter's art constantly lands him in trouble with Principal Revenant, and he has accumulated more detention chains than anyone else in school. But he always remains upbeat and cheerful, always looking for his next masterpiece. Though sometimes coming off rude, he has a soft side and cares about his friends a lot.
Porter has slime green skin, intense blue eyes with two green sclera, and green hair. His limbs are fading away. Speaking of his eyes, his pupils are still black, like most living or undead-living beings. He also has dark-green eyebrows that match his dark green hair, and wears paint-artist inspired clothing that are colorful and look like they have been painted, with his two painter spray cans of "ghost paint" attached to the chain suspenders on his shirt.
Porter is the son of the Poltergeist, which may or may not be his father.
Porter has an interest in Spectra Vondergeist. The interest is mutual. They met in the Monster High movie Haunted. It is implied Porter cares very deeply for Spectra. For example, when Spectra was facing danger, he said, “I could lose you.” It is also implied that for Porter and Spectra it was love at first sight.
- January 22, 2014: Mattel requests the trademark for Porter "Paintergeist" Geiss.
- July 26, 2014: Preview photos of Porter "Paintergeist" Geiss reach the internet seconds after the reveals at San Diego Comic-Con International.
- Spring 2015: Porter "Paintergeist" Geiss makes his 3D cartoon debut in "Haunted".
- Porter's OBEY art is a reference to the 1988 scifi movie They Live and the 1989 Andre the Giant Has a Posse street art campaign it inspired.