Yoon is one of the main characters in Akatsuki no Yona and is a member of The Dark Dragon and the Happy Hungry Bunch. He is the self-proclaimed “beautiful boy genius” caretaker of High Priest Ik-Soo, and the one who helps Yona and Hak recover after they fall from a cliff. He is the first person to join Yona’s journey as per Ik-Soo’s recommendation and continues his role of being the caretaker among the team. Born in a poor village in the Fire Tribe territory and he lost both of his parents at a young age and became an orphan. This tragic event caused him to grow up fast and learn to survive on his own. While trying to survive he late met the High Priest Ik-Soo after he was kicked out of the castle by General Yu-Hon before his death and had been living and taking care of Ik-Soo due to him getting hurt all of the time prior to meeting Yona and Hak. Yoon is very smart, wise and perceptive for his age and most of the time he is mistaken as a girl due to his feminine appearance. Yoon dreams of becoming a doctor and traveling the world but never got to do so out of fear that Ik-Soo wouldn't be able to take care of himself. Nevertheless after much persuasion from Ik-Soo he later joins Yona and Hak on their quest to find the legendary four dragon warriors. Yoon is a boy with a feminine face and a short stature that makes him easily mistaken for a teen girl. He has very fair skin, a pair of bright blue eyes and short apricot-colored hair with long bangs parted in half that hangs down to his cheeks. He adorns his hair by putting two small white feathers on its left side. He is also very handsome and very cute, which is pointed out most frequently by Yoon himself. He covers half of his upper body with a short, light blue cloak finished in fringes and fastens it around his neck. Underneath it, he wears a pale green tunic tied with a yellow sash. The sleeves of his tunic extend past his hands and he wraps long brown wristbands atop them. On the bottom, he wears plain gray pants and a pair of light brown fringed boots. He carries a bag full of important things such as medicine and cooking ingredients. Yoon is a kind, thoughtful, smart, pacifist and skillful boy who takes great pride in his brains and looks as he confidently proclaims himself a “genius pretty boy”. From time to time, he throws insults at everyone, seeing how the group can be rowdy despite the fact that they need to keep a low profile. However, behind his sharp tongue, he genuinely cares for everyone’s well-being, and is easily moved to tears. At a young age, Yoon learned to be independent and resourceful in order to survive. Whenever he’s in a tough situation, he prioritizes his safety first even by means of abandoning someone in need. However, after meeting Ik-soo, his selfish nature disappeared and became the person he is right now: someone constantly on the look out for others. He also tries to be like Ik-Soo by helping people out, and deems himself as a 'self-satisfying hypocrite' by doing it. Yoon has stated that he has the ability to remember anything he reads, and this skill helps him remember all texts and experiences he goes through: this fuels Yoon's want to continue seeking new knowledge. He carries a travel log to keep records of important things throughout their journey. As the story progresses, Yoon becomes more determined to learn more about medicine for the sake of Kouka's people who suffered and died after realizing how incapable he still is in that area. He has a strong disliking of violence, hence why he is hesitant to harm or kill other humans. However, he claims that he would be willing to do so if it were to protect someone he cares about. He has a great disdain for royalty and higher-ups, and views them as sly and filthy people. Over time, as he witnesses Yona’s change, his views are slightly altered, as he realizes that not all nobles are ignorant and selfish. Most of the time he is considered a mom to the group because of the way he always makes them food and also sews their clothes. This is seen very often in the manga, and especially in the moments when he yells at the rowdy members of the group - most of all Zeno.