Shuichi Saihara, otherwise known as just Experiment 154, is the most dangerous experiment, he was locked away in his padded room of a laboratory, tested on constantly. Shuichi had already caused the deaths of multiple caregivers out of fear, but who could blame him when he was this scared and confused.

Kokichi Ouma was assigned to be the new caregiver to Experiment 154, he was only able to get this job because he lied to the interviewer about what work experience he had, he only did this because he was bored but he thought it was worth it.

“Hey there, Experiment 154... or Shuichi Saihara, I guess... I’m Kokichi Ouma, and your new caregiver now.” Kokichi was holding a tablet while he was behind the safety glass of the room containing Shuichi, he was provided with information of Experiment 154 and was currently examining Shuichi.