Her increasingly prominent appearances in state media over the past three years are fuelling speculation that she is being prepared as her father's successor.
Analysts suggest this visit could be a calculated move by Kim Jong Un ahead of an upcoming ruling party Congress, where her succession might be formalised.
South Korea's Unification Ministry remains cautious, stating it is too early to confirm her as successor, given her young age and lack of an official position.
Kim Ju Ae, believed to be around 13 years old, has also attended New Year celebrations and made her first public overseas trip to Beijing with her father.