Marionette Louise "Mary" Test is a fictional character from the American animated series Johnny Test.
She and her younger twin sister, Susan are both super-geniuses and one of Johnny Test's older sisters who use their little brother like a lab rat for many of their experiments and inventions in their home laboratory, most of which he doesn't mind at all, unless he's bribed by them for one that he doesn't want to do.
Both Mary and Susan attend school at the Porkbelly Institute of Technology (aka Porkbelly Tech) and harbor a crush on their next-door-neighbor, Gil Nexdor, who doesn't even know they exist.
She is very open-minded than her sister, but much less outspoken, where Mary is open to more hypothetical sciences such as extraterrestrials and cryptids, much to Susan's skepticism, who is strictly sticks to facts and realistic science.
Mary Test has been suggested to play 31 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.
