Hishikawa Rikka

Hishikawa Rikka is one of the main Cures in Doki Doki! Pretty Cure. Her Cure form is Cure Diamond (キュアダイヤモンド).

Appearance
Rikka has navy colored hair that is styled downwards with a back side braid going down. Her eyes are dark blue.

Personality
A quiet girl, Rikka is childhood friends with Mana and Alice. She is a genius at her studies, being one of the Top 10 scorers in the national trial exams. She is the student council's secretary, and is sometimes taken advantage off by Mana, the president.

Cure Diamond
"The light of intellect! Cure Diamond!!"

"英知の光！キュアダイヤモンド！！"

"Eichi no hikari! Kyua Daiyamondo!!" Cure Diamond (キュアピース) is the Pretty Cure alter ego of Rikka. She is blue, with blue hair and eyes. Her hairstyle resemble Aqua's, with curls at the end. Her top is long and like Moonlight's, while the bottom resembles Moonlight's style but at Splash Star's skirt length. The costume overall is Aqua, while the sleeves, skirt and inner lining are white. There is a blue ribbon with short ends on her right side, no ribbon at her chest, a blue heart at her left side. Her sleeves are assymetrical, with feathers only on the left side. She has simple yellow rings at her wrists and neck. She wears short white boots like Dream in Yes! Pretty Cure 5 GoGo! with sharp toetips or like Cure March from [http://prettycure.wikia.com/wiki/Smile_Pretty_Cure! Smile Pretty Cure!]. Her costume is not midriff-baring.

Etymology
Hishikawa (菱川) - Hishi (菱) means "a diamond shape", while kawa (川) means "river".

Rikka (六花) - The kanji rikka (六花) means "snow". Individually, Ri (六) means "six" while ka (花) means "flower".

Trivia

 * She is the third to have "kawa" (that means river) in her last name. The first is Kurokawa Ellen from Suite Pretty Cure! and the second is Midorikawa Nao from Smile Pretty Cure.