Michael Scofield a.k.a "The Engineer"
Crimes: Armed robbery & several prison escapes
Michael is described as "always scanning the surroundings", and "has the silky voice of a sociopath (and) the resigned stance of a long-distance runner" and projected an unflappable determination that confounded his fellow prisoners, as, being close to Abruzzi or T-Bag or Bellick, he could not afford to be vulnerable or even appear human. Michael often is outwardly taciturn and stoic, rarely allowing the dangerous element he's frequently surrounded by to penetrate his thoughts. Michael has been clinically diagnosed with low latent inhibition, a condition in which his brain is more open to incoming stimuli in the surrounding environment. As a result of this condition, he is unable to block out periphery information and instead processes every aspect and detail of any given stimulus. This, combined with a high IQ (as a psychiatrist explains) theoretically makes him a creative genius. His intelligence is well noticed even by his enemies.
Theodore Bagwell a.k.a "T-Bag"
Crimes: Kidnapping, assault, murder, rape & much more
Despite being despised by the other convicts for his heinous crimes and affiliation with the Alliance for Purity, T-Bag is quite eloquent and many women find him charming. Knepper comments that, "T-Bag's not crazy. He knows exactly what he's doing. He's not going to make himself stupid." In a separate interview, Knepper says, "I never known him like a stereotypical racist or redneck. He's actually quite cunning and smart." He likens the character to "Truman Capote without a degree."
As an adult, T-Bag starts committing more serious crimes, such as battery, assault, attempted murder, murder, rape, and kidnapping.
He's a raw animal.
Benjamin Miles Franklin a.k.a "C-Note"
Crimes: Collaborator & treason
As one of the Fox River Eight escapees, C-Note's main specialty revolves around being able to smuggle any random material in and out of any given territory. Apparently, this was also notified by his commanding officer right before he was dishonorably discharged. He also has an observant side about him, as he is the only one whom Scofield reluctantly recruited for the escape to have figured out what Abruzzi's PI crew were conducting on the break room on his own. While he genuinely respects Scofield as the man who broke them out of jail, C-Note, like any other father, cares more for his family and going even as far as handing Michael out to Mahone in exchange for his family's safety as well as attempting a suicide. When Roy Geary smugly stole an object of sentimental value from Westmoreland (whom C-Note forced into handing over to keep the plan safe), his immediate expression was anger.
