The lines looks like a Smartphone, which the girls use to transform into Pretty Cure, using Princess Decoration.
Princess Decoration is the transformation Device in Royalty Princess Pretty Cure. Using Transformation Princess Decoration , by putting it on the top of the lines, it helps to transform the girls into Pretty Cure. It can also hold the power of other Princess decoration, creating different effects when using them on it.
Lines looks like a pink and white colored touch screen smartphone with a black screen. It has a pink button with an image of telephone in it, another pink button with an image of a heart in it and third pink button with images of pink-, Yellow-, White-, and blue hearts. It also has four heart-shaped jewels on it, all of them colored with either pink, yellow, white or blue, the theme colors of the cures. The top of the Line is different depending on the Mascot who has transformed into it. There is a spot where the Lune is placed, and the screen changes depending which Princess Decoration is placed on the Line.
- The Lines are the fifth that lead the fairy mascots to transform into communes.