Mary Test

Characteristics
Mary is a 13-year old super genius and the twin sister of Susan and also the older sister of Johnny. Mary has been shown to be more empathetic and sympathetic than her sister. Like her sister, Mary harbors a deep love bordering on obsession for the Test's next-door neighbor Gil Nexdor. Like her sister, she attends school at the Mega Institute of Technology. Mary is prone to believing in the less scientific and more science-fictional, which, although it receives scorn from her twin, often proves to be correct in the end. Mary seems to be more level-headed than her twin Susan, and Mary tends to be more conservative, as she speaks her mind much less than Susan. Though Mary wears pants, she seem to be more "Girly" than her twin Susan. This is revealed when she decides to make a normal dress in the episode Princess Johnny. Mary is the older of the two.

Appearance
Mary has a yellow shirt with a moon on it, long curly red hair, crescent glasses and a moon-shaped barrette. She has large, green dots for eyes and often wears baggy blue jeans and sneakers with her trademark moon-shirt and lab coat. She sometimes wears a pink bikini and her disco outfit is a pink tank top with purple shorts and sliver boots.