Usami was created by the Ultimate Programmer Chihiro Fujisaki, a specialist in A.I. programming, to take the role as the Observer in the Neo World Program, a psychotherapeutic virtual reality rehabilitation program able to help treat individuals who have experienced trauma. The program would remove harmful memories, then create a peaceful and safe simulation in which to help the individual create new, less harmful memories. As the Observer, Monomi would be able to advise and influence individuals who entered the program. Based on the individual's experiences, she would take on a role which would feel familiar to them, alongside a second Observer who would resemble someone they knew in the outside world.

Against the commands of the Future Foundation, Makoto Naegi planned to try and use the Neo World Program to help rehabilitate the Remnants of Despair, the 15 survivors of The Tragedy from Hope's Peak Academy's Class 77-B. However, because the Neo World Program was still in its experimental stage, it was left vulnerable to exploitation.

Personality:

Usami is gentle and kindhearted, but also very naive and not very smart. While she is strict about rules and certain other things, it's very easy to trick or persuade her. All she wants is to foster love, friendship, and good manners, emphasized in her catchphrase "love, love!". Because of this, she can even come across overly sweet and annoying. She encourages everyone to live in peace and strengthen their bonds with each other. She is very happy and proud when everyone gets along, and scolds them when they do bad and kindly asks them not to do it again.

Usami is afraid of violence, fighting, and cruelty, considering all of it "a big no-no" - the mere thought frightens her. She also emphasizes the importance of caring for the environment, prohibiting the students from throwing trash anywhere on the island (because she stated if you littered it would trigger an alarm). Furthermore, though she is very childish, Usami is aware of sexuality and tries to prevent the teens from doing anything "shameful". Comically, she sometimes incorrectly assumes that one of her students is interested in her and she's shocked by the idea of a romance between teacher and student. She seems to view herself as a lady who needs to be treated with delicacy and respect, though obviously nobody else does.

As the students' teacher, Usami often tries to guide and encourage them and take charge, but she is never taken seriously. She lost the last lingering thread of her authority after she was turned into Monomi and became an unwitting pawn to Monokuma. She is often the butt of his jokes, physically and verbally abused on a regular basis. Monomi rarely tries to fight back, as she believes she can't do anything without her magic stick, but she sometimes tries to snark back at Monokuma with poor success.

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