Dia Tiffany

 is one of the protagonists in Rainbow PoP! Pretty Cure! and its sequel, Rainbow PoP! Pretty Cure! Spectrum Sparkle!. Samara is the main antagonist of the first half before it was killed. Samara was an gore and brutal monster humanoid, who was Valor's daughter, who is part-timer and the strongest general VS assistant. She was not know if who she is. She was looks weak and emotionless. When she first meets Natalie, she is still spying the pretty Cure as Loretta Matte. Later, Later, it was revealed that she was born as Dia Tiffany, known as Princess Diamond Goldlord. She was powerful, but it was became an android, being she was sweet, happy and kind at first, she was now a pale, lifeless and depressed. She was abused and brainwashed. Her emotions are later developed to returned her into human and restore her memory, and she changes her heart and soul. She was a weak girl but she was strong with full of potential strength.

Her pretty Cure ego is Cure Alexandrite, the rainbow of Emotions, holds the power of Universe and the Light.

Cure Tangerine
(キュアアレキサンドライト) is the pretty Cure form of Dia. She represents the rainbows of Emotions, holds the power of Universe and the Light.

Transformation
Colorful Prism! Start! is Dia's transformation phrase in ''Rainbow PoP! Pretty Cure! and Rainbow PoP! Pretty Cure! Spectrum Sparkle!''.