Origin
Japan
Ririka is a cheerful, outgoing girl who wants to be a nurse when she grows up. She is a 4th grade student at the White Dove Academy . Ririka lives in a household of five that consists of her parents, grandmother, and her little brother. In the course of the series a dog, Herb, joins the family. She loves Kanou-senpai. Ririka is oblivious of Seiya's feelings of love towards her, thinking of him as just a friend. Ririka uses the magical phrase " Holy Power, Holy Prayer, be here!" to transform into Nurse Angel. When transformed Ririka's hair is longer, and she has a more serious demeanor. Nurse Angel's primary weapon is a baton, and she can perform a wide variety of energy attacks. Her source of power for these attacks is a powerful healing agent called Green Vaccine, which is made from the Flower of Life. In the anime, she has a limited supply of the Green Vaccine, and once it is gone there is very little she can do as Nurse Angel.

Nurse Angel Ririka SOS
The Evil Forces of Dark Joker are closing in on our planet after having destroyed the beautiful planet of Queen Earth. Now, 10 year old Moriya Ririka, with the help of her childhood friend Seiya and the mysterious Kanon, must transform into the Nurse Angel and find the elusive Flower of Life, the only way to defeat the evil forces. The Flower of Life, that once bloomed all over the Earth, is where no one thought it ever would be. And Ririka must make the hardest decision of her life in order to acquire it and rid the universe of evil once and for all. Source: ANN