Cesar asks Mark if he can go to his house to turn on their security cameras to which Mark reluctantly agrees, claiming to not like Cesar's house. Introduced as Victim One, sometime in September of 1992, Mark gets a call from ' Cesar' who is on the way to the Emergency Room after finding his mother collapsed. This leads him to having a mental breakdown, desperately shooting the alternate before succumbing to MAD and ending his own life. Mark only snapped when the alternate impersonating Cesar presumably revealed the truth: Christianity's saying about Christ was a lie and humanity had been fooled from the very start. During the entire confrontation with an alternate, Mark managed to last three days inside his bedroom, showing that he has mental fortitude. The 'THINK principle' explicitly states that locking your doors and staying home was the safest approach to avoid an alternate encounter. He appeared to be paranoid about going over to Cesar's house, notably due to the 'THINK principle' being broadcasted to the entirety of Mandela County and its surrounding counties. His interactions with Cesar showed he was concerned for his friends and family. Mark has some sort of fear of the Torres household for unknown reasoning, whether due to a past experience or simply his exaggerated paranoia is unknown. Having encountered 6 at a very young age may have left an impact on Mark growing up, as can be seen in Exhibition. Mark is an overly paranoid, possibly traumatized individual.

He is seen wearing a gray hoodie over a black T-shirt with blue jeans. Mark is a round-faced, fair-skinned young man with fluffy brown hair and eyes.

The diary of a nobody book