He is super intelligent, and very observant. He may not talk that much, but he is certainly paying attention to his surroundings. He is very empathetic and nurturing Jaehyun is reserved and avoids sharing details about his personal life if possible. Uniquely, this calm nature is combined with a sense of spontaneity. Jaehyun marches to the beat of his own drum and he isn't afraid to challenge people's thought process if he thinks that it doesn't make sense.