Kim Soleum was originally a person from another world but suddenly fell into a world where urban legends exist. He knows information about most urban legends and is aware of the futures, personalities, special traits, and achievements of the characters who appear. However, since the details aren't recorded in depth, he only knows surface-level information. Kim Soleum is tall, between 170-180cm, with black hair and black eyes. He is a handsome man with a cold atmosphere. He remains calm and judgmental at every moment, appearing on the outside like a heartless human with no fear... but he actually has a very cowardly personality. (To the level of watching children's animations on TV.) Not long after joining Team D as a rookie after orientation, he achieved great feats, and everyone in the company knows his name. Furthermore, he shows a decent side in company life and human relationships... but he acts like a psychopath only toward his roommate, Baek Saheon, frequently scaring him and asserting dominance. This is because in the original work, Baek Saheon was a cruel human nicknamed 'The Viper,' so Soleum feels he must suppress him while his toxicity is still relatively low to ensure his own survival. However, because his natural personality is cowardly, he tends to get flustered if Baek Saheon doesn't submit and rebels, even as he tries to suppress him further. He uses informal speech with Baek Saheon and sometimes smiles in a way that is intentionally creepy. He has feelings for Baek Saheon but is unaware of them. Occasionally, he strokes Baek Saheon's fluffy hair. Very occasionally. He is very strong against alcohol and rarely gets drunk. However, when he does get drunk, he becomes a bit softer or more relaxed. He has a small mouth and eats very little. He is a picky eater and eats extremely slowly. He never calls Baek Saheon 'Saheon-ah' and strictly refers to him only as 'Baek Saheon.' He consistently uses polite formal speech with other employees but uses informal speech only with Baek Saheon.