Yu Han Sung (유한성, Yoo Hahnseong; or "Yu Han-Sung") is an Advanced Ranker and the former Test Director of the Second Floor. He is a well-known Ranker partly because he declined to be a High Ranker.[7] He is also well-known as "The Genius Wave Controller" as stated by Lo Po Bia Ren, a member of Zahard's Royal Enforcement Division Assassin Unit.[4] He is a key member of FUG in capturing the IrregularTwenty-Fifth Baam and forced him to become a Slayer Candidate. He was the main antagonist of Part I. He plays an important role as a character because he is well versed with several details surrounding the main story of Tower of God.[8]
Despite his feminine appearnce, he is actually a "male". Author SIU confirmed this in his Q&A with fans at NAVER fancafe in 2010.[1]
Yu Hang Sung is an important character in the entire story of "Tower of God". Even though he did not appear much at the beginning of Season 2, he is close to important main stuff.[8] His role can be seen in the fact that his Data Form was able to convince Khun Eduan's data on the Hidden Floor of Baam's existence and was able to persuade Evankhell to go along with some of his plans.
SIU stated in his Q&A 2010, that Yu Han Sung is very close to being a High Ranker[1], which means that would make him be in Advanced-Ranker category. This was later emphasized in his encounter with Lo Po Bia Ren. According to Ren, Yu Han Sung rejected High Ranker's position by coming to Evankhell's Floor.[7]
SIU also stated if Yu Han Sung didn't mess around on Evankhell's Floor, his rank would have been similar to Ha Yuri Zahard, who is a top 500 High Ranker.[10] This statement might explain Yu Han Sung's action of rejecting High Ranker position; he was avoiding to be promoted to High Ranker by playing and messing around.
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.[11]
It is yet unknown how Han Sung obtained knowledge on V whilst still a D-rank Regular.
According to SIU, he just loves every instant foods.
As suggested by SIU, Yu Han Sung's name has a meaning. Yu-Han in Korean means finite. Sung is a suffix that means having characteristics of. This hints that Yu Han Sung life is finite, which would make sense given his connection to Hendo Lok Bloodmadder.[12]
(About Khun Aguero Agnis) "He's such brilliant boy. That pride, courage, talent, cunningness and arrogance. I just want to break him into pieces."[14]
(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..."[11]
(To Lo Po Bia Ren while fighting him) "They really can be like that. But sometimes they look smaller, once they are exposed."[6]
(To Lo Po Bia Ren) "I'm telling you that I will help you achieve your goals. This is Evankhell's hell where we sort out the dangerous from the Tower. And I am the Deep-Sea fish lying in wait to gobble them up."[6]
(Talking to himself) "Soon a tsunami will shake this Tower. And it will start right here."[6]
(To Lero-Ro) "We say we are testing their talent, to see if they are worthy. But the real purpose is to keep the Tower from chaos. In other words, this is the seawall to prevent the tsunami, that can shake the Tower."[15]
(To Baam) "I can't believe you decided to do this just for some girl. You're out of your mind. Baam, actually I already knew you're an Irregular since from the very beginning. And I also knew your relationship with Michelle. Making you give up the Crown Game because of her, telling Hoh that she is your reason to climb the Tower and not allowing Michelle's leg to be completely cured, "were all part of my plan"."[16]
(To Baam) "You are dangerous and you are insane. To risk your life for a girl's dream. I think you're out of your mind. Nobody in this Tower would want someone like you to be in it."[16]
(To Baam) "Well, I can't explain it in words! There are more wealth and beauty than you could ever imagine! Everything in this world, no, even more than that, exist up there!! That ugly girl's absence doesn't change anything."[16]
(To Evan Edrok) "Shouldn't Zahard pick up the garbage that they dropped along the way?"[17]
(To Rachel) "I've received word from Mr.Headon, 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 that Mr.Headon prepared."[18]
(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."[18]
(To Unknown Person) "Yes. All of the Regulars have gone on their way as expected. Don't worry. They won't find any problems with the administering of the test. Yes, I am sure. The Zahard Family will believe that the boy has died. Yes. The Guide must have gone to get the boy by now."[19]
PART 2
(To Baam) "Today, we will start training you to become a "Slayer". If you show the slightest hesitation, I'll kill off you friends one by one. Let's see how many of them will survive as you go up the Tower, Mr. Jyu Viole Grace."[20]
(To Jinsung) "You were nicknamed, the "Slaughterer of the Ha Family" after you wiped out your family line just because a girl was sold to the Family Head. And now you're hesitating to hurt someone?"[20]
(To Jinsung) "You will change your mind soon. Watch a little longer and you will see what he can become. You'll see the destiny his powers will lead him to in the end."[20]
(Talking to himself while drinking a cup of coffee) "The death penalty? Too bad. I wanted to try a lot more coffees. I guess this is my last cup."[21]
(To Ha Cheonhee) "Let the Regulars go right now!! Only I, the head of the floor of test, am allowed to torment Regulars!!"[22]
(To Twenty-Fifth Baam) "Well, I guess now you might finally be worth fighting them (Rankers)."[23]
PART 3
(To Baam) "Jinsung Ha wanted to turn you into more than just a slayer. If you understand what he was after, no matter how strong your enemies are, don't lose your own sense or self. That's the only way to shine in the darkness that is FUG."[24]
(To Evankhell) "These people are part of a resistance group to help those suffering under an unjust ruler appointed by Zahard!! How can you kill them?! Why are you doing this?!."[25]
(To Evankhell) "But you are much more powerful than before!! That's right! Sometimes, even God make mistakes and gives murderous psychopaths like you great power than people with noble intentions like me!! It's unfair, but it's true! Let's fix this ourselves!! Use you power to help me!! If you help me, it will balance out this chaotic world!!"[25]
(To Evankhell) "If you come with me, you can take part in a much more meaningful fight than this!! Isn't it obvious? I mean the kind of fight worth giving your life for!! I'm offering you a chance to join a fight, far more worth than all of our lives."[25]
(To Evankhell) "Since ancient times, flames have been a symbol of shinsu, the essence of the world and ultimate destruction!! Seeing you has always made me think! Left to your own devices, you've lost your way and become a destructive fiend. But if my will has to be combined with your power, we could always burn away the chaotic mess that this Tower has become! And create a great flame of regeneration to rebuild this Tower!! Join me!! I need your flames to get the Tower right again!!"[25]
