Yu Yuan is the main protagonist of the story. Originally a survival game enthusiast, he is unexpectedly transported into a wasteland world after clicking on a mysterious link in a game. He draws the Riot District as his starting area and quickly builds a shelter in a sewer system's air-raid shelter for concealment. On his first day, he triggers hidden conditions by bringing back supplies worth over 10,000 Survival Points, weapons, and being only slightly injured, while his shelter is underground. He gains the 'Block Rat' title and his shelter ranking jumps 141 places. He uses his title's enhanced hearing and low-light vision to navigate the dark. He ventures to Wutong Apartment, where he kills three thugs (Brother Biao, Monkey, Key) using a crossbow, a kukri knife, and a tripwire trap. He negotiates with a mysterious attacker, sacrificing some supplies to escape safely. He is cautious, resourceful, and adaptable, showing strong survival instincts. He also obtains a folding crossbow, a kukri knife, and other tools. He selects the Fate Card "Slaughter" and must kill a human within two days, which he accomplishes by killing Key. He constantly evaluates risks and makes decisive moves to ensure his survival.
