Did Not See This Coming

Susan and Mary Test where on their way to the lab and have run into a bit of trouble. Now they made an interesting notion about this situation

Susan Test is the twin sister of Mary Test and is the younger of the twins.

Susan is a super genius scientist. She is the younger twin of her sister Mary. Susan has been shown to be less empathetic and sympathetic than her sister. Like her sister, Susan harbors a deep love and obsession for Gil.  Bling-Bling Boy (A.K.A Eugene) has a huge crush on Susan but whenever he tries to get her to fall in love with him it always fails, mainly because Johnny foils him or Susan turns him down (Susan always rejects Bling Bling Boy's advances, as she finds him repulsive). Like her sister, she attends school at the Porkbelly Institute of Technology. Susan is prone to believing in the more scientific and logical explanations for things rather than the illogical and magical explanations. Her sister is more open-minded, and Mary is frequently proven correct. Susan seems to be less level-headed than her twin Mary, and tends to be less conservative, as she speaks her mind much more frequently.
 
Mary Test is a major character of Johnny Test. She is the elder of the two twins.

Mary is a super genius and the older 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 Porkbelly Institute of Technology (a.k.a "Porkbelly Tech" for short). 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 seems 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 twin of the two. Her age appearance appears to be somewhere around fifteen years old. Susan and Mary test are very smart. They are smarter than Bling Bling Boy and Mr. Black and Mr. White, but one thing for sure: they don’t know how to get Gil's love. Susan and Mary Test would both like to be Gil's girlfriend, which often gets them into tied fights, which often proves her brother's intelligence of knowing that she and her sister can't both have Gil as a boyfriend.