Nefritis Romca is the elven princess of Romca, the Land of Wind, and the chosen successor to the Ring of Wind. Her background is marked by a deeply sheltered upbringing: her late parents commanded her to never go out into the world, a directive she faithfully obeyed and which was further reinforced by her overprotective brother, Jade. This isolation conditioned her to be extremely shy and timid, and she becomes intensely nervous around new people, to the point of vomiting from worry and nerves. Despite this profound social anxiety, Nefritis is a kind and sweet-natured individual who harbors a strong curiosity about the wider world and is particularly interested in romance. Her primary motivation centers on overcoming her reclusive fears to participate in the journey alongside Satou and the other ring princesses. In the story, she serves as the bearer of the Ring of Wind, a role that grants her control over wind-based abilities; her parents had previously used this ring to create a great wall of wind to protect the elf city. Her key relationships include her brother Jade, whose overprotectiveness contributed to her isolation, and Satou, on whom she initially relies heavily for guidance and support—a dependence that creates tension and jealousy from Hime. Throughout her arc, Nefritis develops from a shut-in princess who struggles to interact with others into a more capable and adventurous individual who joins the group's quest. Her notable ability is her connection to the Ring of Wind, allowing her to wield wind magic in defense of her allies.