Monika is aware that she is a character in a game. Yuri is a yandere in “Doki Doki Literature Club!”. Monika is a Isolationist and Manipulative Yandere introduced as the Literature Club president, she is very driven and goal focused with a passion for poetry and music. So basically, everyone dies and the protagonist is left to deal with the fact that basically everyone he knows is dead. Everything goes back to normal except there isn’t a Monika and Sayori is the new president of the club, only for her to become obsessed with you.
What happens if you delete Monika after sayori dies? The Doki Doki Virus (ドキドキ・ウイルス Doki Doki Uirusu) is a biological computer virus created by the Belief Club President Kai. It reaches a point where, after she confesses her love to the protagonist, she stabs herself to death out of over-excitement or rejection (depending on the protagonist’s response to her confession, both lead to the same outcome, courtesy of Monika). She is ultimately unable to control her obsessive outbursts. You might be interested: Readers ask: Doki doki literature club hang? Why did Yuri kill herself?