The series features Grand Prince Gyeseong, who expresses himself through gender non-conforming attire. His portrayal is handled with dignity and sensitivity. The Queen's response to discovering his secret is one of unconditional love and protection, affirming his identity. The show frames societal judgment as an external challenge, maintaining an empathetic stance throughout.

The film "Under the Queen's Umbrella" features Prince Gyeseong, a character who expresses gender non-conformity through feminine attire and activities. His identity is handled with dignity and complexity, particularly through the Queen's unconditional acceptance and protection of his secret. The narrative frames his expression as a personal truth, affirming his worth despite societal pressures, thus contributing to a net positive portrayal of gender non-conforming themes.