Yeo Goseng

Yeo GoSeng is a Regular that we meet first time in Ch. 82.

Part II
Yeo GoSeng is the eigth person to enter the testing room. Ja Wangnan was about to attack her guiltlessly because she was not wearing a uniform. He was stopped when Miseng calls out to her, calling her unni. Kang Horyang's wing turns into hearts when he first looked at her. While they are waiting for the next person to come in, Wangnan starts to yell at everyone for being so compliant. When he shouted at MiSeng, Goseng screams back at him and hugs MiSeng. When the next competitor, Hon Akraptor, tries to vote Miseng off, Goseng yells at him to stop doing whatever he wanted. A fight breaks out between Arkraptor, Horyang, and Jyu Viole Grace when Viole announces that he would drop everyone. After Viole blasts the two of them away with Shinsoo, GoSeng identifies the mark he wore on his coat as those worn by slayers in FUG. This shocks everyone and causes them to fear Viole. She is seen hugging MiSeng after Viole downs Horyang and Arkraptor.

While they are waiting for the second part of the test to begin, MiSeng gives everyone (but Arkraptor) chips. Wangnan angrily asks, "What do you think this is, a picnic?!" to which GoSeng smacks him and tells him to just eat it. She scolds MiSeng when chips were given to Viole, telling her that she shouldn't do dangerous things. When another regular made it out the elevator, bloody and weak, she stands up to help him but is stopped by Wangnan, who says that they would have to drop him later anyway.

GoSeng scores worse than MiSeng for the World's Greatets Shinsoo Contest. She is seen sitting against the wall along with the other regulars who thought they had failed. When Wangnan starts to cry about his loss, she scolds him and tell him to be manlier and that his tears were making MiSeng cry too. Faced with both their weeping, she gives up in trying to stop their tears. She is surprised by Wangnan's attempt to convince Viole to pick him.

Trivia

 * GoSeng's glasses are so round and big that it covers half of her face. We never see her eyes.