Yoon Bum

Yoon Bum is the main character of Killing Stalking. He is depicted as a scrawny young man due to being underweight. Having straight short black hair with bangs that part down the middle of his forehead and has black eyes with what appear to be notable bags under his eyes. He's rather small for his age and has a youthful if not boyish face (Being called someone's "Baby Brother" once and a kid sometimes). Outside of that, his figure is often reminded to the readers to be similar to one of a woman's. Even Sangwoo recalls it often throughout the story and how Bum reminds him of his mother. Yoon Bum also has a scar on his chin from Sangwoo and more on his wrists from self-harming. He is shown as a quiet, shy and sensitive individual who sees affection towards him as a sign of love. Growing up with knowing nothing but abuse at the hands of his uncle, paired together with Oh Sangwoo's abuse towards him later, Bum developed the mindset of thinking that he's disgusting and deserves to be punished. Dealing with loneliness and thinking that he isn't needed by anyone, Yoon Bum cut his wrists in the past regularly. While rather naive, he is definitely not stupid as he was able to stalk Sangwoo who never noticed him, break into his house and almost poison him with rat poison once to escape Sangwoo's abuse and his fear of possibly dying by his hands. He is very timid when it comes to Sangwoo, sometimes insecure. He also seems to have a special fondness for frogs. Though still unconfirmed, it is hinted at the beginning of the Manhwa and many signs are shown throughout the story that he may suffer from Borderline Personality Disorder.