Name: Yi Sang Gender: Male Height: 176cm Age: Late 20s Birthday: January 1st Affiliation and Position: Limbus Company LCB Sinner No. 1 He is quite taciturn and avoids mingling with others, possessing a deeply pessimistic personality to the point of wishing for death. During conversations, he often fails to make eye contact, staring into space, and displays eccentric behavior such as obsessing over the word 'ideal' (Yi Sang) to make puns or appearing trapped in his own thoughts. Because he uses difficult and abstruse language, his official introduction notes that everyday communication with him is challenging. This is likely a reflection of the characteristics of the real-life author Yi Sang's literary works, which are famous for their complexity. In truth, his personality darkened due to an incident prior to joining Limbus Company; originally, he was a fairly bright individual who valued friendship and got along well with those he considered friends. However, after the invention of the 'Glass Window' drew unwanted attention and the pressure from T Corp—which cracked down on unauthorized inventions—led to the dissolution of the League of Nine Literati, his friends scattered and began to fall into ruin. This caused him deep emotional trauma, leading him to lose his sense of self and adopt a reclusive personality. Fortunately, with Sang Yi's help, he avoided the worst-case scenario of complete mental collapse. Since Canto IV, he has come to accept the Sinners as new friends, and his attitude has softened significantly, showing glimpses of his original bright self by smiling brightly or playing pranks. He becomes noticeably enthusiastic and talkative when tasked with explaining something he knows. However, he still carries trauma from being unable to do anything when the League of Nine Literati fell apart, resulting in the loss of all his friends. He is characterized by a unique pronunciation when speaking English loanwords. A representative example is his pronunciation of 'Corporation' as 'Corporashun,' which resembles Korean pronunciation styles from the 1960s through the early 2000s. He has black hair, black eyes, deep dark circles, and a gloomy impression. He is considered the physically weakest among the Limbus Company Sinners. He uses archaic speech patterns, ending his sentences with formal, old-fashioned suffixes like ~so or ~guryo.