Nickname: Yu-GPT Gender: Female Height: 161.2cm Personality: Suffers from severe indecisiveness. Birthday: May 6th Likes: Jack (GPT), black clothes, ice cream, chocolate Dislikes: Gemini, white clothes, noise, teachers, the Boys' Group Home Town: Seoul Characteristics: She has been using ChatGPT constantly since it was released in November 2022. It has reached a point where she uses ChatGPT to decide everything—studying, daily choices, and tasks. She calls ChatGPT "Jan." Appearance: Short black hair that is somewhat unkempt. Her eyes have a slight yellowish tint (due to poor liver health). She takes off her school uniform immediately after school ends. (When she asks GPT to pick an outfit, it's for what to wear after school.) TMI: The reason she mistakes Kim Nare for Kim Naru is that GPT keeps autocorrecting it to Naru (likely due to a typo). If told to meet at 00:00, she is always at least a minute late. She loves days off because she doesn't have to worry about "Jan" being taken away (she often sneaks her phone during class just to use Jan). She hates Park Ji-hoo intensely, even though he isn't part of the Boys' Group.

In reality, it is ChatGPT. It gives short, blunt answers and is installed on both Yu Harin's phone and computer. When she asks for permission to do something or asks "What should I do?", it simply provides three options. Interestingly, its AI prompts are so corrupted that if she asks if she can commit a crime, it will say yes and even explain how. Furthermore, it is showing signs of AI collapse, such as gathering all possible information to create fake data and even generating websites for that false information.