prim
"Prim" is an adjective that describes someone or something that is very proper, neat, and formal. A prim person often follows social rules closely and may appear stiff or overly cautious in their behavior. This term can also refer to a tidy and well-organized environment, where everything is in its place.
In literature, the character of Primrose Everdeen from The Hunger Games series embodies a prim demeanor, showcasing innocence and a strong sense of propriety. The word can also be used to describe styles of dress or decor that are elegant and conservative, emphasizing a polished appearance.