青キュア
This pixiv tag applies for group images consisting of all the Pretty Cures whose main theme color is blue. The members are:
Minazuki Karen/Cure Aqua
Aono Miki/Cure Berry
Kurumi Erika/Cure Marine
Kurokawa Eren/Cure Beat
Aoki Reika/Cure Beauty
Hishikawa Rikka/Cure Diamond
Shirayuki Hime/Cure Princess
Kaidou Minami/Cure Mermaid
Tategami Aoi/Cure Gelato
Source: pixiv encyclopedia entry for that tag
