|Season||Cosmic☆Star Pretty Cure!|
|Hair Color||Black (Seiki)|
|Eye Color||Green (Seiki)|
|Family||Hiroshi Akari (mother)|
Hiroshi Kenta (father)
Hiroshi Seira (twin sister)
|Voice Actor(s)||Itō Kanae|
|Pretty Cure Info|
|Alter Ego||Cure Wonder|
|Theme Color||Royal Purple|
Seiki is a free spirited, kind and thoughtful fifteen year old girl who is always by Chiyo's side to support her for the loss of Pandora, even acting as an older sister around her at times. She is very imaginative, loving to draw and write her own stories. She has a fascination for space and always wonders what it could be like to live in outer space. She loves to travel to experience different cultures and meet new people as well as meeting 'aliens' from space.
Cure Wonder means "the emotion aroused by something awe-inspiring, astounding, or surprising." 
"The star of wonder shining in the galaxy! Cure Wonder!"
Ginga ni kagayaku fushigi no hoshi! Kyua Wandā!
Cure Wonder (キュアワンダー Kyua Wandā?) is the Pretty Cure alter ego of Seiki. She controls the power of time and transforms with the phrase, "Pretty Cure, Celestial Power!". Her main attack is Wonder Year.
"Pretty Cure, Celestial Power!" - Pretty Cure, Celestial Power is the official transformation phrase used by Hiroshi Seiki to transform into Cure Wonder in Cosmic☆Star Pretty Cure!.
Seiki's voice actor, Itō Kanae, has participated in several image songs for the character she voices. Many of them include duets with Nanjō Yoshino, who voices Terumi Chiyo.
- Seiki is the first purple Cure to not have a rough past, a cold personality or already knowing about her powers before the show began. Instead she has a normal past, a very friendly personality and becomes a Pretty Cure in episode 5.
- She is also the first purple Cure to have black hair in civilian form instead of a dark shade of purple.
- She is the first purple Cure to be partners with a pink Cure.
- Seiki is the first ever Cure to control the power of time.
- She is the second Cure who wants to go to outer space, after Hanasaki Tsubomi from Heartcatch Pretty Cure!.
- Seiki shares some traits with three Cures from the franchise. She shares the love to draw with Mishou Mai from Futari wa Pretty Cure Splash Star and Kise Yayoi from Smile Pretty Cure! and shares her love for writing with Akimoto Komachi from Yes! Pretty Cure 5 and Yes! Pretty Cure 5 GoGo!.
- ↑ http://www.behindthename.com/name/hiroshi
- ↑ http://www.babynamespedia.com/meaning/Seiki/m
- ↑ http://www.thefreedictionary.com/wonder