Complex sentence: Nike, the fourth princess of the Rain Dukedom and she has the power to call forth the rain, travels to the Sun Kingdom to marry Sun King Livius for her country, despite her own reluctance.
Split into simpler sentences: Nike, the fourth princess of the Rain Dukedom, possesses the power to call forth the rain. She travels to the Sun Kingdom to marry Sun King Livius for the sake of her country, despite her own reluctance.