Hishikawa Rikka

Hishikawa Rikka (菱川 六花) is one of the main Cures in Doki Doki! Pretty Cure. She is one of Mana's childhood friends and the secretary of Oogai First Middle School's student council. Her Cure Ego is Cure Diamond (キュアダイヤモンド).

Appearance
Rikka has navy colored hair that is styled downwards with two side braids joining at the back and going down.Her eyes are dark blue. Her casual costume consists of old styled blue dress, which is where she wears her Cure Lovead, with light blue colored sleeves and dark blue colored ribbon on her neck. She has short royal blue socks and brown shoes. She is also sometimes seen wearing red glasses.

As Cure Diamond, she has blue hair and eyes. Her hairstyle might resemble Cure Aqua's, with curls at the end. Her top is long, like Cure 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, and a blue heart on the left side of her chest. Her sleeves are assymetrical, with feathers only on the left side. She has simple golden bracelets on her wrists and neck. She wears short white boots with sharp toetips. On her right side, hangs her Lovely Commune.

Personality
Rikka is a quiet, honest, blunt, not afraid to speak her mind and a very intelligent girl. She is a second year student at Oogai First Middle School, and the student council's secretary. She loves to study, and is a genius at it, being one of the Top 10 scorers in the national trial exams. She is great at observing people and situations. As noted by Mana in episode 9, Rikka is at the top of the class and constantly placed as the first place in her school, however her scores started to drop as she was in second place because of starting to play competetive karuta, as it was seen in episode 14.

Rikka is childhood friends with Mana, since they live near each other. Ever since they were children, Rikka has been taking on the responsibility of looking after the troublemaker Mana, sometimes being taken advantage of. Despite that, she also was always protected by Mana which makes Rikka trust her. She strives to lead a quiet school life, but is often dragged into various things by Mana.

History
Rikka is Mana's best friend and they have known each other since elementary school. She always tries to stop Mana from overdoing things but cannot seem to do so. Her mother works late at a local hospital and her father travels the world as an Archeologist. Rikka finds out about Pretty Cure when Mana decides to tell her because it is hard for her to keep a secret form her best friend. She later runs into the mysterious merchant who gives her a Cure Lovead that she later decides to use to help her friend as Cure Diamond.

Relationships
Aida Mana  - Mana is one of Rikka's very close childhood friends and current schoolmate.

Yotsuba Alice - Alice is another one of Rikka's childhood friends, as they met in elementary school.

Kenzaki Makoto - Makoto is one of her Pretty Cure teammates.

Raquel - Raquel is Rikka's transformation partner who helps her tranform into Cure Diamond.

Hishikawa Ryoko - Rikka's mother, she appears as a doctor which always is late.

Hishikawa Yuuzou - Rikka's father, who appears as a professional photographer, and often travels a lot.

Aguri Madoka - She and other Cures met her during the battle with Regina.

Ira - Rikka has a different relationship with Ira then she does with the other seflish trio, she took him in and looked after him in episode 26 and went against Cure Ace to protect him, Ira has been teased by Marmo of having a crush on Cure Diamond, and he has also called her an 'Angel' in episode 26, whether he does have feelings for Rikka or not is unknown, although there are many hints to show that he does. In episode 32 Rikka gets upset that Ira has turned against her again and tells him to stop, he refuses though, which upsets her. However,  she doesn't know that it's actually because he is under Bel's control with his life at risk because of the Blood Ring.

Cure Diamond


"The light of Wisdom! Cure Diamond!!" "英知の光！キュアダイヤモンド！！" "Eichi no Hikari! Kyua Daiyamondo!!"Cure Diamond (キュアダイヤモンド) is Rikka's Pretty Cure alter ego. She represents the light of wisdom.

Transformation Rikka first places her transformation Cure Lovead onto Raquel's silver heart medallion object and shouts "Pretty Cure Love Link!" She then spells "L-O-V-E" on her Lovely Commune and the transformation begins. First, her hair color changes and grows into a long ponytail. Her hair then turns to a lighter blue and her hair accessories and diamond shaped earrings start to appear. Her dress then appears and her Lovely Commune attaches itself to it. Next is her heart brooch, braclets and boots. Finally her dress ribbon appears and Cure Diamond poses saying her introduction speech.

Attacks

 * Twinkle Diamond (トゥインクルダイヤモンド)  is Cure Diamond's main attack, with the incantation  "Sparkle! Twinkle Diamond!" (煌めきなさい！トゥインクルダイヤモンド！) . Cure Diamond activates her attack with the Lovely Commune. It then blinks twice and she points her finger towards the foe, releasing a flurry of blue diamond-shaped energy beams. With this attack she can also freeze enemies.


 * Diamond Shower (ダイヤモンドシャワー) is Cure Diamond secondary individual attack that appear in Episode 11, firstly, she summon the Love Heart Arrow and set the Diamond Arrow Lovead within, then it shines, she take the arrow and she tap her arrow a couple of times releasing a big wave a diamond.
 * Diamond Swacle (ダイヤモンド スワークル) is Cure Diamond's third individual attack performed with Magical Lovely Pad. It hasn't appeared yet, but it seems that is going to appear in episode 31 or 32 along with the other cures new attacks.

Power-Ups


Like her Cure partners she can Power Up by herself when she takes serious the battle, when this happens a blue light appear around her body.

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".

Songs
Rikka's voice actor, Korobuki Minako, has particated in several image songs for the character she voices. Many of them include duets with Nabatame Hitomi who voices, Aida Mana, Fuchigami Mai who voices, Yotsuba Alice, and Miyamoto Kanako who voices, Kenzaki Makoto.
 * COCORO♦Diamond

Duets

 * Natsu no Ryuuseigun (Along with Nabatame Hitomi)

Trivia

 * Rikka is the eighth Cure known to be good at her studies.
 * She is the third Pretty Cure to have "kawa" in her last name. However, she is the only of the three who does not have a color in her family name.
 * She is the first Pretty Cure to wear bracelets instead of arm warmers.
 * She is the fifth Pretty Cure to have a long dress.
 * She is the fourth Cure to have glasses. However, all of which do not wear glasses in their Cure form.
 * However, neither Rikka and Tsubomi tend to wear glasses in their civilian form most of the time.
 * She is the second Cure to have a diamond as her symbol.
 * On Tumblr, Rikka is commonly known for a meme called "Rikka dancing", spawned from her being framed during a particularly silly part of Kono Sora no Mukou's choreography.
 * She has some similarities with Kurumi Erika:
 * Both of their theme color is blue.
 * Both of them became Pretty Cure on third episode.
 * Both of their fathers are photographers.
 * Both of them use water related powers when they are in Cure form. (Erika uses ocean powers, Rikka uses ice powers.)
 * The two curled side braids in Cure Diamond's hair might represent dog ears, given that her mascot partner resembles a puppy.



Gallery
{{scroll box
 * content====Official Gallery===

Previews

 * Cure Diamond official profile (TV Asahi).
 * Cure Diamond old profile (TV Asahi).
 * Cure Diamond full profile (Toei Animation).
 * Official header stance.
 * Cure Diamond profile for Pretty Cure All Stars Everyone Gather ☆ Let's Dance!.
 * Cure Diamond profile in Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi.
 * Cure Diamond's Special Blackboard Profile for New Stage 2
 * Cure Diamond's Full Stance from Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi
 * Rikka official profile (Toei Animation).
 * Rikka official profile (TV Asahi).
 * Rikka with her parents at a carnival in the opening.
 * Rikka wearing her glasses.
 * Rikka without her glasses.
 * Rikka meets Mana for the first time.
 * Rikka smiles.
 * Rikka about to transform.
 * Rikka wearing her Cure Lovead in Episode 3.
 * Rikka with Mana and Alice when they were younger, seen in the DDPC04Episode 4.
 * Rikka smiles in DDPC10Episode 10.
 * Rikka with her mother in DDPC10Episode 10.
 * Rikka as a gang leader in Mana's imagination, seen in DDPC14Episode 14.
 * Young Rikka, seen in DDPC14Episode 14.
 * Cure Diamond's finishing pose.
 * Cure Diamond during her transformation.
 * Cure Diamond in the Doki Doki! Pretty Cure opening.
 * Cure Diamond is forming a diamond suite during her introduction speech.
 * Cure Diamond appears in an ending card in DDPC03Episode 3.
 * Cure Diamond thumbs up to Cure Heart.
 * Cure Diamond during the showing of the episode title.
 * Cure Diamond fights Grey.
 * Rikka appears in Pretty Cure Online.
 * Cure Diamond introduces herself in Pretty Cure Online.
 * Cure Diamond's concept.
 * Cure Diamond's head concept.
 * Rikka's concept art.
 * Rikka's head concept.
 * Rikka's pajamas concept.
 * Cure Diamond official profile (TV Asahi).
 * Cure Diamond old profile (TV Asahi).
 * Cure Diamond full profile (Toei Animation).
 * Official header stance.
 * Cure Diamond profile for Pretty Cure All Stars Everyone Gather ☆ Let's Dance!.
 * Cure Diamond profile in Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi.
 * Cure Diamond's Special Blackboard Profile for New Stage 2
 * Cure Diamond's Full Stance from Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi
 * Rikka official profile (Toei Animation).
 * Rikka with her parents at a carnival in the opening.
 * Rikka wearing her glasses.
 * Rikka without her glasses.
 * Rikka meets Mana for the first time.
 * Rikka smiles.
 * Rikka about to transform.
 * Rikka wearing her Cure Lovead in DDPC03Episode 3.
 * Rikka with Mana and Alice when they were younger, seen in the DDPC04Episode 4.
 * Rikka smiles in DDPC10Episode 10.
 * Rikka with her mother in DDPC10Episode 10.
 * Rikka as a gang leader in Mana's imagination, seen in DDPC14Episode 14.
 * Young Rikka, seen in DDPC14Episode 14.
 * Cure Diamond's finishing pose.
 * Cure Diamond during her transformation.
 * Cure Diamond in the Doki Doki! Pretty Cure opening.
 * Cure Diamond is forming a diamond suite during her introduction speech.
 * Cure Diamond appears in an ending card in DDPC03Episode 3.
 * Cure Diamond thumbs up to Cure Heart.
 * Cure Diamond during the showing of the episode title.
 * Cure Diamond fights Grey.
 * Cure Diamond's concept.
 * Cure Diamond's head concept.
 * Rikka's concept art.
 * Rikka's head cocept.
 * Rikka's pajamas concept.
 * Cure Diamond official profile (TV Asahi).
 * Cure Diamond old profile (TV Asahi).
 * Cure Diamond full profile (Toei Animation).
 * Official header stance.
 * Rikka official profile (Toei Animation).
 * Cure Diamond profile in Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi.
 * Cure Diamond profile for Pretty Cure All Stars Everyone Gather ☆ Let's Dance!.
 * Rikka official profile (TV Asahi).
 * Cure Diamond's Special Blackboard Profile for New Stage 2
 * Rikka with her parents at a carnival in the opening.
 * Rikka wearing her glasses.
 * Rikka without her glasses.
 * Rikka meets Mana for the first time.
 * Rikka smiles.
 * Rikka about to transform.
 * Rikka wearing her Cure Lovead.
 * Rikka with Mana and Alice when they were younger.
 * Rikka smiles.
 * Rikka with her mother.
 * Mana thinking as Rikka was possesed.
 * Yound Rikka
 * Cure Diamond's finishing pose.
 * Cure Diamond during her transformation.
 * Cure Diamond in the Doki Doki! Pretty Cure opening.
 * Cure Diamond is forming a diamond suite during her introduction speech.
 * Cure Diamond appears in an ending card in episode 3.
 * Cure Diamond thumbs up to Cure Heart.
 * Cure Diamond during the showing of the episode title.
 * Cure Diamond's concept.
 * Cure Diamond's head concept.
 * Cure Diamond official profile (TV Asahi).
 * Cure Diamond old profile (TV Asahi).
 * Cure Diamond full profile (Toei Animation).
 * Official header stance.
 * Rikka official profile (Toei Animation).
 * Cure Diamond profile in Pretty Cure All Stars New Stage 2: Kokoro no Tomodachi.
 * Cure Diamond profile for Pretty Cure All Stars Everyone Gather ☆ Let's Dance!.
 * Rikka official profile (TV Asahi).
 * Cure Diamond's Special Blackboard Profile for New Stage 2
 * Rikka with her parents at a carnival in the opening.
 * Rikka wearing her glasses.
 * Rikka without her glasses.
 * Rikka meets Mana for the first time.
 * Rikka smiles.
 * Rikka about to transform.
 * Rikka wearing her Cure Lovead.
 * Rikka with Mana and Alice when they were younger.
 * Rikka smiles.
 * Rikka with her mother.
 * Mana thinking as Rikka was possesed.
 * Yound Rikka
 * Cure Diamond's finishing pose.
 * Cure Diamond during her transformation.
 * Cure Diamond in the Doki Doki! Pretty Cure opening.
 * Cure Diamond is forming a diamond suite during her introduction speech.
 * Cure Diamond appears in an ending card in episode 3.
 * Cure Diamond thumbs up to Cure Heart.
 * Cure Diamond during the showing of the episode title.
 * Cure Diamond fights Grey.}}
 * Cure Diamond fights Grey.}}