Jinu is a charismatic yet duplicitous person who primarily looks out for his own interests. Alongside the Saja Boys, he devises a new plan to destroy the Honmoon permanently, offering to help Gwi-Ma soley in exchange for the erasure of his memories. Internally, Jinu struggles with a deep sense of shame for choosing to abandon his human family for an easy life, that was only made possible by Gwi-Ma. Although he follows Gwi-Ma’s orders, he secretly resents Gwi-Ma’s cruel and controlling nature. Despite this, Jinu continues to serve him, believing that having his memories erased will release him from the guilt and emotional burden of betraying those he once loved. While the Saja Boys were clashing with HUNTR/X, Jinu appeared to enjoy teasing Rumi, Mira, and Zoey. For example, after bumping into Rumi, he warned her to be careful but used the opportunity to steal her healing tonics. He then drank one during a performance of "Soda Pop," much to Rumi’s shock. Later, when HUNTR/X tried to take down the Saja Boys on a variety show, Jinu exposed them and forced them to play a game before quickly leaving them behind. Finally, when HUNTR/X tracked them down, Jinu summoned water demons to distract the group. He is shown laughing at his own deception as the Saja Boys flee. Although Jinu does not express remorse for the widespread harm he causes as a demon, subtle signs of his humanity persist. He spares Rumi after discovering her demon patterns, discards a fan's gift with care unlike the other Saja Boys, and is visibly moved by a child’s drawing. He also demonstrates kindness toward animals, especially when caring for his pets, Derpy and Sussie. Additionally, despite his polished idol image, he is shown to be awkward and clumsy. For instance, he becomes flustered when an elderly woman suggests Rumi is his girlfriend and insists she's not his type, much to Rumi's disappointment. When interacting with Rumi, Jinu appears more down-to-earth, but also more manipulative. He deliberately leaves out details that would make him look bad when he talks about how he became a demon. Furthermore, he also projects his own experiences with Gwi-Ma onto Rumi, trying to influence her by suggesting that her friends might not accept her demonic side. Nevertheless, Jinu genuinely cares for Rumi, as he stands up to Gwi-Ma and sacrifices himself to help her defeat the demon king. Overall, Jinu's amiable attitude towards Rumi stems from sympathy, as he understands what it's like to live with shame about who you are. Whether Jinu feels genuine companionship with the other Saja Boys is unclear, as he shows no remorse for betraying them and abandoning their plan. In fact, he is never shown talking to them in a casual setting. "I LEFT THEM! That's right, I lied to you. I only made a deal with Gwi-Ma to get myself out of that miserable life! I left my sister, my mother alone, while I slept in silk sheets in the palace with my belly full every night! I left them! I left them..."