Tenaka Chiasa

Shakku Rubina is one of the main Cures from Beautiful Sky Pretty Cure. Rubina is a cheerful and very brave 13 year old girl. She gets excited over many things very fast and always tries to master them, even though it’s something she is bad at. She usually tries to be perfect but fails of course. Rubina is pretty clumsy but a good friend and an even better older sister towards her two younger sisters. Her catchphrase is "Do what you can!" (何ができるか！).

She holds the power of the red flame of passion. Her alter ego is called Cure Phoenix (キュアフェニックス). She replaces Cure Crimson as the Pretty Cure of Passion.

Personality
Rubina is a cheerful and very brave 14 year old girl. She gets excited over many things very fast and always tries to master them, even though it’s something she is bad at. She usually tries to be perfect but fails of course. Rubina is pretty clumsy but a good friend and an even better older sister towards her two younger sisters.

Appearance
Rubina has scarlet colored, short hair, tied into a small ponytail. Her eyes are red. She wears a black open shirt with a white top underneath. She wears a red Lacrosse skirt, white shoes and red socks.

As Cure Phoenix, her hair changes to red, grow longer and are styled into a loose ponytail. She wears a red dress with poofy short sleeves. Her skirt has a top layer of frilly red with layers of white underneath it. She wears dark red arm warmers. Her boots are knee-length, with red folds at the top.

Family

 * Shakku Ruby - Rubina's mother, who was a former Pretty Cure.
 * Shakku Cornelian - Rubina's father
 * Shakku Akane & Shakku Seki - Rubina's younger sisters

Friends

 * Akihen Ammolite

Etymology
Shakku (赤空) - Aka (赤) means "red", a reference to her alter ego as Cure Phoenix and to her theme color. Sora (空) means "sky", which is fitting to the main theme of this season. Her name means "red sky".

Rubina (ルビーナ) - Rubina is derived from Italian rubino meaning "ruby", ultimately from Latin ruber "red". It could also come form the German word ruby, meaning "ruby".

Cure Phoenix - Phoenix comes from the name of a beautiful immortal bird which appears in Egyptian and Greek mythology. After living for several centuries in the Arabian Desert, it would be consumed by fire and rise from its own ashes, with this cycle repeating every 500 years. The name of the bird was derived from Greek phoinix meaning "dark red".

Cure Phoenix
Cure Phoenix (キュアフェニックス) is Rubina's Pretty Cure alter ego. She holds the power of passion and controls fire. She replaces Cure Crimson as the Pretty Cure of Passion. Cure Phoenix has strong powers but is afraid of heighst. She transforms by saying Pretty Cure New Rainbow Paint Over!.

Alone, Cure Phoenix can perform Passionate Raspberry. With her Rose Crystal, she can use Rainbow Inferno. Together with all Cures, she can perform Beautiful Starlight and with their Crystals Rainbow Twinkle Arrow.

Attacks

 * Passionate Raspberry - is Cure Phoenix's main attacks.
 * Rainbow Inferno - Cure Phoenix's upgrade finisher.

Transformation
"Pretty Cure New Rainbow Paint Over!" - Pretty Cure New Rainbow Paint Over! is the official transformation speech used by Shakku Rubina to transform into Cure Phoenix in Beautiful Sky Pretty Cure.

"Jewel Rainbow Fruit Crossover!" - Jewel Rainbow Fruit Crossover! is the official transformation speech used by Shakku Rubina to transform into Mirabelle Ruby in Beautiful Sky Pretty Cure !Jewel Revolution!.

Songs
As a main character, Rubina's voice actor, Yūko Gibu has particated in several image songs for the character she voices.
 * Big Sister
 * Red Burning Raspberry

Duets

 * Ballad of Pretty Cure (together with Yuka Imai, Hayashibara Megumi, Uchiyama Yumi, Chinatsu Akasaki and Youko Ninshino)

Trivia

 * Her original name was "Rubin" but has been changed to Rubina.