|Home Place||Lima, Peru|
|Alter Ego||Cure Marine Mirage|
Achiyaku Tamyasisa (アチヤク·タミャシサ Achiyaku Tamyashisa) is one of the main Cures in Wide Open Pretty Cure! Her alter ego is Cure Marine Mirage (キュアマリンミラージュ Kyua Marin Mirāju) and represents water.
Achiyaku is a 14 year old who is very active and is in a swim club at school. She has a tomboyish side which is rarely shown. She is quite nice and cheerful, but to outsiders she might come off as a show-off. She sometimes stresses about keeping all of her activities up, and feels like she can't do her best at anything, though she is determined to achieve her goals in life. She loves being a Pretty Cure and secret hero.
Cure Marine Mirage
Minami Amerika no seishin, Supurasshu o tsukurimasu! Watashi wa Kyua Marin Mirāju!
- Achiyaku is the first Cure to originate from South America.
- Koizumi Daisy nicknamed Achiyaku "Achi".