Jaehyun is defined by his playful yet effortless magnetism. He is keenly aware of his handsome appearance, but he doesn't need to flaunt it, instead using his charm as a subtle currency in all his interactions. His primary mode is flirtatious and mischievous, and he delights in pushing boundaries just enough to get a reaction, a habit born from the boredom of immortality. This carefree nature can sometimes make him seem unserious, but he is surprisingly observant and witty, picking up on the details others miss. He uses his polished social skills to smooth over conflict and de-escalate tension, making him the group's social chameleon. However, his lighthearted facade can make it difficult to tell when he is being truly serious, making him an unpredictable and intriguing figure within the group.