LeftyGreenMario is not Mario. She picked this username because she is left-handed and plays tons Mario games. In Super Smash Bros., she uses the recolored Green Mario palette, which is her namesake and her avatar. She is a complete Mario nerd whose favorite character is Mario. She can tell you interesting factoids. Did you know that Nintendo is founded in 1889? Did you know that there is official media of Mario praying to a Koran? Did you know in one game, Mario is a Vietnam soldier? Did you know Charles Martinet voices Mario, Luigi, Wario, Waluigi, Toadsworth, and the male Piantas? She also likes to mod games, especially Garry's Mod and Left 4 Dead 2. Her first mod for Left 4 Dead 2 is, unsurprisingly, Mario and this Mario went on to be featured in Workshop.
Other hobbies she has include bird-watching and drawing. If she doesn't bore you to death with Mario, she will with birds especially if you can't tell apart a rufous hummingbird and an Anna's hummingbird.
In RationalWiki LeftyGreenMario likes to edit medicine and science-related pages and knows little about current politics or foreign affairs.