Hime, whose true name is Crystal Novati Nocanatica, is a central figure in the narrative. She is a princess from another world who has been living in hiding on Earth, where she grew up as a childhood friend and neighbor to the protagonist, Satou. Hime eventually returns to her home world to fulfill a predetermined marriage, but Satou follows, and she ultimately chooses him as her husband, passing on the power of the Ring King to him.

In terms of personality, Hime is generally depicted as a bubbly and fun individual with a warm and adorable design. While she often presents a cheerful and sometimes mischievous demeanor, this masks a more complex emotional core. She carries significant anxiety and an inferiority complex because she knows that the Ring King is destined to marry four other princesses to gain enough power to fight the Abyss King. As the other ring princesses join their group, each possessing unique traits, Hime struggles with feelings of insecurity and jealousy, fearing she might lose her special place in Satou's heart. This emotional turmoil runs deep, and at one point, she is shown experiencing a nightmare where she sees Satou with another woman, a manifestation of her fears. Her character arc involves confronting these darker feelings and striving to overcome her anxieties.

Her primary motivation is her deep, long-held love for Satou, whom she has known since childhood. Even though he had forgotten, she had revealed her true nature to him and given him part of her ring when they were young. Throughout the story, her actions are largely driven by a desire to protect her bond with Satou and to be his most cherished partner, not just one of several. This motivation is a key driver of her personal development as she learns to trust in Satou's genuine affection for her.

Hime's role in the story is foundational. As the first Ring Princess and the possessor of the Light Ring, her initial marriage to Satou sets the entire plot in motion. She serves as the emotional anchor for Satou, who followed her into a new world to be with her. While she holds the power of the Light Ring, which is of immense importance, her role is as much about emotional support and relationship dynamics as it is about combat. In the second season, the group undergoes a Bride's Trial to strengthen their bonds and abilities, and Hime's relationship with Satou deepens through these hardships.

Her most significant relationship is, of course, with Satou. The two share a deep and honest connection, and she is the one he loves the most among the ring princesses. She also has a complex relationship with her younger sister, Morion, who is introduced in the second season. Morion is a sage apprentice who harbors both admiration and jealousy towards Hime, creating a layered sibling dynamic. Hime also has a close bond with her grandfather, the great sage Arabasta, who was instrumental in her life on Earth and in her home world. She develops a relationship of rivalry and camaraderie with the other Ring Princesses, each of whom is a potential rival for Satou's affection but also a fellow warrior in their shared mission.

The character shows notable development by confronting her own insecurities. In the second season, a darker version of her is even seen in character visuals, hinting at a struggle with inner darkness or the corrupting influence of the Abyss. However, she ultimately gains reassurance when Satou affirms that she is his most beloved.

As for notable abilities, Hime is a Ring Princess, which means she possesses a magical ring that grants powerful abilities. She is the holder of the Light Ring. When she kissed Satou, she transferred a portion of this power to him, allowing him to fight as the Ring King. While the full extent of her personal combat abilities is not detailed in the provided information, her value as the Light Ring Princess is paramount, as without her, Satou could not have become the hero destined to challenge the Lord of the Abyss.