Yu Han Sung

"But sometimes, because they conceal themselves, they actually appear smaller than they are."

- Yu Han Sung to Lo Po Bia Ren

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 Part I.

History
In the past, Yu Han Sung was about to be killed by Evankhell, but before that, Evankhell asked, "What are you afraid of?" as she was curious as why he wasn't scared when his life was in danger, and then Yu Han Sung responded back saying that he never thought he would live forever, saying he is not scared of dying, however, his only fear is having his rage/goal fading away, to be able to change the tower. Evankhell in response also said she is afraid of that too and asked what Yu Hansung is trying to achieve, with him responding, "I want to usher in a new era in this tower".

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 a 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 "" 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 fulfill 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".

Yu Han Sung's Examination
Yu Han Sung was one of the Rankers proctoring the tests on the Second Floor. He directly proctored the Door Test and observed the groups of Regulars as they attempted to pass it. When Koon's team passed the test, he noticed that Koon was hiding Regulars inside his bag and subtly hinted to Koon that he knew. When all the Regulars had taken the test, Yu Han Sung discussed some of the Regulars' methods of passing with his test assistants.

Crown Game
After Quant informed him that only three Regulars had passed the "Deathmatch" Test and also that an Irregular and Zahard's Princess were in the group, Yu Han Sung was left in a serious predicament. If Evankhell found out, there would be severe repercussions for the both of them. However, Yu Han Sung thought up a plan to deal with the problem: the Crown Game.

Rest
Later, Yu Han Sung discussed the results of the Crown Game with Lero-Ro. He stated, that the Floor of Test was to filter dangerous individuals before they could enter the Tower.

Hide-and-Seek
Later, Yu Han Sung observed the Hide-and-Seek Test with Lero-Ro. He is in charge of grading the overall team. He talks to Lero-Ro about Koon's performance, cryptically noting that Regulars would have to drop off "excess weight", signifying their comrades, as they climbed higher and higher up the Tower. He also reveals his cruel side, as he states that he wanted to destroy Koon due to his multi-faceted personality.

Submerged Fish
During the wait until it was time to announce the results, Rak bumped into Yu Han Sung, disrespected him, and was subsequently compressed to a small size.

Before announcing the results of the Position Test, he tracked down Ren and engaged him briefly, before stating that their goals were the same and that there was no reason for them to fight. He revealed his power to Ren as the "" of the Second Floor.

Last Examination
Following the announcement of the results of the Position Test, Mauchi got angry at the Rankers overseeing the tests. After being called down to discuss why he thought the results were wrong, Yu Han Sung snapped his bones with Shinsoo. Koon then also disagreed with the results and came down and said that he wished to get a test from the Guardian, to which Yu Han Sung replied that he was insane and that to get such a test one would need to be an Irregular. When Baam revealed that he was an Irregular, Yu Han Sung allowed him to see the Guardian. Afterwards, he told Baam that he had been trying to destroy him all along.

During the Submerged Fish Hunt Test, after Evan Edrok and Kurudan burst into his quarters, Yu Han Sung revealed to them that everything had been planned by the Guardian and that the seemingly unusual events were part of the test.

Epilogue - Rachel
His connections with Rachel, Headon, Hwa Ryun and Akryung were revealed.

Later on, Yu Han Sung gave the passing Regulars special rings as a graduation gift before they ascended to the next Floor. After they had gone up, Lero-Ro quit his position as a Test Admin causing Yu Han Sung to fire Quant too as he considered them a "Set Menu". He was finally seen communicating with someone else via his Pocket assuring them that the Zahard Family would think Baam was dead.

20F – Epilogue
He was contacted by the 20th Floor director, Augusgus, who referred to him as the "".

Extra Floor
In a flashback set three days after Baam's presumed 'death', it was revealed that the rings given to the Regulars were custom-made with tracking devices. As he handed over Baam's friend list as he stated, "Starting from today we will start your training to become a Slayer. For each and every-time you show a shred of weakness we'll kill one of your friends. You will know how many survived, once you've climbed The Tower... Jyu Viole Grace-nim".

Workshop Battle – Epilogue
Poken informs Karaka that the "" replied to their query and provided them with the location of Jyu Viole Grace.

Three Orders
Yu Hansung was visited by Zahard's Army. The Red Brubya tells him to listen to the commands of King Zahard and says he is going to be executed for hiding the identity of an irregular and manipulating information saying the irregular is dead. He then drinks his coffee saying it is his last cup but was interrupted by Evankhell saying "Who says it's the 'last'?" while she destroys an entire warship. Yu Han Sung was delighted to see Evankhell after her long trip. Multiple rankers came out and said they are Kallavan's servant. Yu Han Sung immediately recognised the name, calling him the 'Human Collector' and wondered if he actually joined Zahard's Army. After the fights between Evankhell and Kallavan's Servants, the Guardian appeared saying they are disturbing his sleep and the guardian shoots a laser beam looking as it would have killed them but actually teleporting them to another dimension.

Tower of God: Part 2 - The Last Station
Yu Hansung and Evankhell later arrived at their destination. Death Bird, a servant of Karaka, came to see the visitors and was relieved to see Yu Hansung. Since the Second Floor Guardian sent them there, there must be a reason to be there. Then a warp gate opens, and they saw Karaka was in trouble so Yu Hansung, Evankhell, and Karaka's Servant went together to the Last Station

Evankhell
When they arrived, Yu Han Sung told Evankhell to not use too much power or else the floor guardian will get involved, and that he'll go save the regulars. Yu Hansung easily got past Dorian Frog and destroyed Phonsekal Drak's lighthouse, with Drak questioning if he was a High Ranker. He then encounters Ha Cheonhee, and attacked her, but she easily blocked his attack. Yu Hansung was outclassed by Ha Cheonhee, and almost got killed by her if Yuri did not secretly help with an unknown ability that was also used to capture Karaka. Yu Hansung witnessed Baam's growth when he foddered the C-Class Regulars and say he is worth fight 'them'. A huge shock was felt by Hansung and everyone around the Last Station, and they saw Evankhell on a rampage, easily defeating high rankers.

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.

Yu Han Sung Style: Yu Han Sung developed his own Shinsoo control style. Anima: His favourite animal to control as an Anima, is a gigantic fish he nicknamed "" after his Sobriquet.
 * Shinsoo Bubble: Yu Han Sung is able to create a Shinsoo Bubble in order transport people or move things.
 * Amplification Skill - Boiling Mass (증폭기 보글 보글, Jeungpoggi Bogeul Bogeul) : This is Hansung's special skill. He uses a wave to maximize the effect of shinsoo. Using this skill it is hard to attack with precision, even though you can significantly amplify even a small amount of power.
 * Shinsoo Control Skill -  (신수제어술 장천, Sinsujeeosul Jangcheon): A powerful beam with ripples spreading around it. Yu Hansung used it against Dorian Frog in order to get past him.
 * Splash Damage Skill - Raging Rapids (광역기 낙수천굉, Gwang-yeoggi Nagsucheongoeng): This technique creates a enormous ball of shinsoo above user, which is thrown at the target. Massive amounts of dense shinsoo fill the area. Even nearby Lighthouses can be blocked, so that Light Bearer couldn't use them.
 * Lethal Move - Rapid-Fire Shinsoo Cannon (살인기 다연발신수포, Sal-ingi Dayeonbalsinsupo): A giant wave of shinsoo, that created multiple beams and rapidly hits everything in front of it.

Wonsulsa: It is unknown if he is a legitimate Wonsul user, or whether he learnt Wonsul naturally.

Dansulsa: He is apparently a Dansul user.

Quotes

 * (To Koon Aguero Agnis after the Door Test) "Your bag seems very heavy."
 * (About Koon Aguero Agnis) "He's such brilliant boy. That pride, courage, talent, cunningness and arrogance. I just want to break him into pieces."
 * (To Lo Po Bia Ren) "This is Evankhell's Hell where we sort out the dangerous from the Tower. And I am the Deep See Fish lying in wait to gobble them up."
 * (To Rak Wraithraiser after compressing his form) "Huh? I'm sorry. I couldn't see you because you were too small. Oh my. Sorry. Too small. One moment. Just one more spin..."
 * (To Rachel) "I've received word from Headon-nim. Miss Michelle Light. It must've been tiring to complete the first test. Ah, perhaps it wasn't too difficult. Since you were with a person Headon-nim prepared..."
 * (To Rachel) "Miss Michelle, you need not worry about anything. The teammates you'll need, the rights, and strength, I will steal all of it for you."

Notes and Trivia

 * Rak referred to Yu Han Sung first as "Golden Turtle" and later as "Coffee Addict Turtle".
 * He is the endorser of the Maxim coffee brand as seen in a vending machine.
 * According to SIU, he is deeply connected to Hendo Lok Bloodmadder.
 * SIU stated if Yu Han Sung didn't mess around on Evankhell's Floor, his rank would have been similar to Yuri's.
 * It is yet unknown how Han Sung obtained knowledge on V whilst still a D-rank Regular.

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Yu Han Sung