Yook Seongji

''Seongji Yuk" was a member of the 1st Generation and the King of Cheonliang. He was called the Monster of Cheonliang Mountain, possibly due to him having 6 fingers on each hand and 6 toes on each foot. He was the mentor of Vin Jin. He was a disciple of Jin Mujin, Vin Jin's father.

APPEARANCE:- Seongji Yuk is portrayed as dressing quite messily, wearing a black tank top and a pair of dirty, baggy gray jeans. His footwear seems to be somewhat heavy-duty, and he wears a black jacket tied around his waist and occasionally wears Cheonliang Fam jacket over his shoulders.

Physically, he is shown to be quite muscular and handsome in a rugged way, with shaggy black hair that almost reaches his shoulders, and solid black irises with prominent eye bags.

He has polydactyly, with six digits on both his hands and feet. Though he lost his extra appendages on both his hands and feet due to Shinmyung Cheon's cruelty in chapter 492, they have since been reattached.

PERSONALITY:- Seongji is shown to be quite rough in his demeanor, calling Vin Jin a funny bastard and threatening to kill him when called a monster during their first meeting.

Despite this, he is a very dedicated man, choosing to fight the Kojima Brothers as well as three members of Generation 0 in order for the Cheonliang Fam to have a chance to escape. When they were caught, he would choose to take any punishment from the Shaman in Vin Jin's place.

As a result of serving as the offering, he has severe PTSD, choosing to live in the mountains to avoid the eyes of the village's people. This PTSD can even trigger a special kind of seizure that causes him to destroy everything and everyone around him, though he won't remember anything.

HISTORY:- Early in his life, likely around the age of late elementary school, he was abandoned in Cheonliang by his family, leaving him for dead on its shores. It was there he would be found by Mujin Jin, who had recently plundered the treasure of the Shaman, including the Red Paper. However, Mujin wasn't able to read Japanese, so Seongji claimed he could before feigning amnesia to get Mujin to stay with him, the man agreeing to do so until Seongji remembered. Mujin taught Seongji how to be self-sufficient, and raised him for a time, helping him to trust other people again. Mujin would then disappear without a trace, leaving behind Cheonliang's treasure for Seongji.

Afterwards, he became a sacrifice for the Shaman's scams due to his polydactyl features and was trained to become a yaksha (a type of "bodyguard") for Shaman's child, a Cheon Taejin, which he never became. He eventually escaped, but upon realizing that he'd be similarly rejected by the outside world, believed that he wouldn't be able to leave and fell into his first seizure, afterward seeking refuge by hiding in the mountains. Since Shinmyeong had no further need of Seongji, planning to make Vin the new sacrifice, he would scheme against the young man by spreading rumors of a monster living in Cheonliang to the circles outside. After a lengthy amount of time spent getting into unwanted fights, he would meet Jichang Kwak.

One day, the children that would go on to be the Cheonliang Fam came across him, though Seongji met them with open arms and hospitality, teaching them about the truth of Cheonliang, with Vin and Sujin Kim joining the family later on.

After Vin discovered the truth of his mother's death, he stormed the shaman's complex alone, causing Seongji to come to his aid while setting his shack alight to call in the other 1st Generation Kings. He would be able to defeat the two Yakshas easily, and would come face to face with James Lee, awakening to three thresholds in the process and defeating the One Man Circle. However, since his fam would be captured, he allowed himself to be brutalized, even having his extra appendages severed, before the 1st Generation Kings intervened.

In the wake of that event, Seongji tried to distance himself from the fam to prevent them from being targeted by his enemies, as well as not to endanger them in his seizures.

After being set up by Taejin Cheon to believe he was the murderer of Sujin Kim, he committed suicide by walking into the ocean and tying a chain hooked to an anchor around his neck, resulting in him drowning.

RELATIONSHIPS:- •Vin Jin He and Vin Jin were quite close, as Seongji was his master and the head of the Cheonliang Fam. Vin deeply regrets not embracing Seongji during the set-up, and blames himself for the King's death.

•Mujin Jin He was Seongji Yuk's master, raising him after Seongji was abandoned by his parents.

•Shigeaki and Hiroaki Kojima They taught him Kudo during his Yaksha training with them

•Cheonliang Fam They called him their master after escaping from the Shaman's scams.

1ST GENERATION:- Despite what some might think, Seongji was close enough to several members of Generation 1, namely Taesoo Ma, Gongseob Ji, Seokdu Wang, Jaegyeon Na, and Jichang Kwak, for them to join forces to invade Cheonliang after Seongji sent them a message, likely asking for help.

FIGHTING POWERS:- His fighting style is unknown, but due to the nature of Cheonliang's fighters, he was likely at the upper end of the 1st Generation. He has been shown to have immense grip strength, grabbing the ribs of two experienced fighters, three in each hand, and squeezing them to the point where they noticeably bend and crack. Later he was revealed to be the disciple of Ssireum legend, Jin Mujin (Vin Jin's father and a man strong enough to rival the monsters of the 0 generation), he was also taught by the Yamazaki brothers to be the Yaksha of Cheon Taejin which he never became. His style mainly included Jin Mujin's Ssireum, a style where while fighting one can break opponents' bones with their grip strength and both Grapling and Striking Kudo taught to him by the yakshas of the shaman. He was also proficient with Judo, which he taught to Mary Kim and the Cheonliang Fam.

In his fight with James Lee, James states that Seongji has overcome two Masteries, of both toughness and power, putting them on a similar level. Despite lacking experience compared to James, he would be able to see his invisible attacks by believing in his eyes, allowing him to overcome the Mastery of speed, putting him a level above James, and allowing Seongji to be the first character in Lookism to defeat him.

In regards to sheer potential, Mujin Jin stated that Seongji was the one with the most potential in his life, and even James Lee attempts to scout him, stating that he'd be better than the two he currently had, likely referring to Goo Kim and Gun Park.

Due to having his extra appendages cut off by Shinmyung Cheon, his strength has been greatly lowered, likely reducing his fighting prowess permanently, but later his fingers were rejoined.