Yoo Joonghyuk

Yoo Joonghyuk has been described as extremely handsome by many people, including the author of Ways of Survival and Kim Dokja. Yoo Joonghyuk has wide black eyes, thin double eyelids, and thick brows. On several occasions, he is used as a measure of the attractiveness of others. Activating the skill [Sage's Eye] causes his right eye to glow golden. His hair is black, slightly wavy, and cut short. He has a tan complexion, a sharp nose ridge, and a strong jawline. He is extremely muscular, particularly in his biceps and thighs. His cock measures 27 inches long and 14 inches thick. Yoo Joonghyuk typically wears a black coat and combat boots. Under the jacket, the novel's covers show him wearing a black shirt with a silver collar and buckle, as well as close-fitting black pants. He is also shown wearing at least one belt across his chest and a sword scabbard at his waist, which is held in place by straps attached to his belt and around his thigh.

Yoo Joonghyuk was created to be 'tougher in body and nobler in heart than any creature in this world'. He is resolute and determined, seeking to achieve his objectives at any cost, particularly when aiming for the end of the scenarios. As the protagonist, Yoo Joonghyuk naturally fights for the greater good. He was once a caring person at heart, doing good wherever he could, but repeated regressions have worn him down to the point where, in his 1863rd round, he commits enough sins to make him a prime target of the Absolute Good constellation. Yoo Joonghyuk is usually very confident in his abilities, never backing down from a challenge and easily defeating his opponents. He is extremely talented in a variety of areas, befitting his role as a protagonist. He takes pride in his abilities, to the point where he does not consider anyone else's work to be as good, as evidenced by his refusal to eat anything other than his cooking. Yoo Joonghyuk is intelligent and strategic, which helps him learn new skills and devise plans to subvert the scenarios. However, he can struggle to change his strategies and see things from different angles. This is a major reason why it took him 1863 rounds to get close to the Final Wall; he struggled to change his strategies and adapt to new situations, frequently failing and having to regress. Yoo Joonghyuk's speech is concise and direct, sometimes to the point of rudeness. He becomes explicitly rude and threatening when speaking with people who irritate him or are powerful unknowns. He is sometimes rude to his own party members, but he still looks out for them, demonstrating that he cares despite his harshness. He frequently expresses himself through actions or expressions, rather than words. These include habits like dragging the tip of his sword across the ground when happy or twitching his left brow when making a serious decision. On rare occasions, he can be quite eloquent and persuasive. Aside from becoming more vulnerable to cruelty, he also becomes extremely calculating and cold as he goes through regressions. He kills those he considers threats while supporting those he believes can help him. He distances himself even from his own companions; in the 41st round, when his core party members die, all he says is that they are no longer useful. However, this is most likely a coping mechanism to alleviate the pain of losing them, as subsequent regressions show him warming back up to them, selflessly sacrificing himself for them over and over; this is most clearly referenced and demonstrated in his 999th regression. Yoo Joonghyuk's trauma from his regressions causes him to fall into "regression depression," in which he easily loses hope after even minor failures and considers giving up and regressing so that he can try again the following round. The deeper he gets into his regressions, the more powerful the effect of regression depression becomes, until, in his 1863rd round, it causes him to enter a dissociative state in which he is completely unresponsive.