Han Yoo-kyung

Han Yoo-kyung (Korean:한유경) is a recurring character in Hello, My Twenties! Season 2. She is a former friend of Ye-eun and Song Kyung-ah, who she met in her freshman year of college. Yoo-kyung was also proven to be the person harrasing Ye-eun.

Background
Not much is to be known about her background except that she met Kyung-ah and Ye-eun in their freshman year of college. They all had the same curly hairstyle, and were sitting next to each other. That's is shown to be the first day they met.

Season 2
In We Believe Because We Want to Believe she is first seen when Yeeun introduces a letter to Kyung-ah and Yoo-kyung. She notices something about the letter and asks if she knows it was sent to her. Yookyung then starts to bite her nails, wondering who the culprit could be while Kyung-ah stares at her suspiciously. Later in that episode, the girls meet up to celebrate Kyung-ah's new job. As they wait she goes to wash her hands. Furthermore, Yeeun is surprised at how overjoyed she is, even though she applied for the same job and didn't get it. While she is gone, Yeeun gets a text reading "Die, die, die" and her face falls. As Yookyung comes back she quickly comforts her. Kyung-ah then says she's had enough.

After berating Yeeun Kyung-ah turns to her, and tells her to stop as well. She mentions that the picture that was scratched out in Yeeun's locker was taken by her, and how she knew about the texts. In addition, Kyung-ah points out that she never asks who the texts were sent by, just asking about the note, because she wrote the texts.