Gamzee Makara, also known by his Trollian handle terminallyCapricious, is one of the trolls. His associated zodiac sign is Capricorn (♑) and his horns resemble those of a goat.
He uses purple as a text color, and used to type with each letter alternating case, which (like most things) annoyed Karkat. After sobering up, his lines alternate between all caps and all lowercase.
Gamzee was named after forumite Gammy, as well as "Gamze", which is a Turkish word meaning "dimple" or "coquettish look". Makara is the Sanskrit counterpart to the Capricorn sign, as well as referring to a mythological Hindu creature with the hind legs of an aquatic creature and the forelegs of a terrestrial one (much like the Greek Capricorn). This land-sea duality could be taken to represent Gamzee's highblood status among the land dwellers (and his lack of care about caste when he isn't sober) as well as his own dual nature. His last name might also come from a breed of goats called "Markhor goats" whose horns have a similar shape to his.