Yu Han Sung

Yu Han Sung (유한성, Yoo Hahnseong; or "Yu Han-Sung") is a High Ranker and the Test Director of the Second Floor. Notably, he is a key member of FUG in taking Viole to the top. He is the main antagonist of

Appearance and Personality

Yu Han Sung is portrayed as a man with long blonde hair and quite feminine or, rather, androgynous features. He always wears hanbok, usually blue and yellow.
Yu Han Sung has been seen as an extremely intelligent and perceptive individual. He is addicted to instant food, which is the cause of many jokes directed at him. Behind this simple outer shell, lies the deadly "Submerged Fish" who destroys those who may pose a threat to the Tower.
Also, he probably recognised and admired Koon Aguero Agnis talents but relished the thought of crushing him as he likely couldn't tolerate the existence of another "genius", due to his own pride and ego.
Despite his abilities that could easily grant him a better job on higher Floors of the Tower, Yu Han Sung remains as the 2nd Floor Test Director to fulfil FUG's goals. He claims that one must "weed out those who will bring harm to The Tower". However, he is recognised for his strength which Lo Po Bia Ren stated "impressed even the Vice Commander".
Yu Han Sung has been described as a chairman by SIU. As in: he makes people "fight each other for his advantage"

Powers and Abilities

Yu Han Sung is a powerful High Ranker of FUG and apparently a genius Wave Controller. An example of his strength is his ability to easily summon and control an enormous fish close to the size of a White Steel Eel. It can be considered that he was an incredibly powerful genius when he climbed the Tower. Ren stated that Yu Han Sung possessed power that even shocked RED's Vice Commander. He is the standard of a High Ranker's strength. When Yu Han Sung said he didn't want to fight Ren, it wasn't him being afraid of Ren's power, but rather the political consequences of battling against a RED member.
Shinsoo Manipulation: He is a master of Shinsoo manipulation, mostly known for his position as a Wave Controller. He was also able to sense that Koon had extra Regulars hidden in his bag, after he passed the Door Test.

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