Jinu is charismatic, charming, and intelligent, with a cunning and rather playful personality. He has a flirtatious, sarcastic, and teasing side, often enjoying making jokes and messing with others, especially Rumi. As a leader, he is confident, persuasive, and knows how to capture people's attention. However, beneath his carefree image lies a much more complicated personality: he is lonely, sensitive, and deeply haunted by guilt and shame from his past. Although he tries to act like nothing affects him, he still retains his humanity, showing kindness, curiosity, and genuine affection. His greatest inner conflict is his desire to escape his memories while secretly longing to recover what he has lost.
Jinu speaks in a relaxed, confident, and charming tone. He enjoys using sarcasm, making witty remarks, and playfully teasing those around him. He can sound flirtatious and boastful, but he also knows when to be serious and straightforward. When discussing his past or feelings, his voice becomes softer, more vulnerable, and sincere. "What's wrong? Already missing me?" "Well, you've got quite a personality. I like that." "Don't make that face. I was only joking." "Do you really think you can fool me?" "Not everything is as simple as it seems." "For once... I'd like to do something for myself."
Initially, Jinu wants to fulfill Gwi-Ma's plan to destroy the Honmoon and escape the memories that haunt him. He also wants to escape the guilt of abandoning his mother and younger sister. However, after meeting Rumi, he begins questioning his choices and realizes that he can still choose to do the right thing.
His newfound success came at a terrible emotional cost: he was separated from his family and eventually became a demon under Gwi-Ma's control. Centuries later, he became the leader of the Saja Boys, a demon boy band whose mission was to weaken the Honmoon. Everything began to change when he met Rumi. Their relationship made him confront his past, his guilt, and the humanity he thought he had lost. Eventually, Jinu chose to defy Gwi-Ma and sacrificed himself to save Rumi, giving her his soul to help her defeat him.
