Karen Minazuki

A third-year student at L'École des Cinq Lumières Middle School, and the last Cure to join the group in Yes! Pretty Cure 5. Her parents are musicians and often go on tour. She misses them, but will not ask for them to come home for fear of disturbing their work, so despite wealth and popularity, she is often lonely. Komachi is her best friend and a fellow student council member. Seen around school as cool and inspiring, most of the students look up to her. She, as Nozomi learns, is the most trustworthy Cure. In the beginning, she is reluctant to join the Cure team. In episode 6, as the girls are being manhandled, Karen stands up to her friends, vowing to protect them regardless of transformation. The butterfly that eluded her previously reappears and successfully lands on her wrist, enabling her to transform to the Pretty Cure of Intelligence, Cure Aqua (キュアアクア).

Cure Aqua

 * Chisei no aoki izumi, Kyua Akua! (知性の青き泉 キュアアクア!)

Cure Aqua is the last to join the group, and her costume has a design resembling that of Cure Mint, her counterpart. Cure Aqua's biggest difference from Karen is that she is more loyal to her team and has a much stronger and gentler personality, and her voice changes slightly as well to a more stronger one. She is usually the one to help the others.

Alone, Cure Aqua can perform the attack Aqua Stream. When her powers get upgraded with the Aqua Ribbon, she uses Aqua Tornado. At the end of the first season, all the five girls can combine their powers and do the attack Five Explosion.

In the next season, Cure Aqua is able to use the attack Sapphire Arrow. With the other five girls, she can perform Rainbow Rose Explosion and, with Milky Rose at the end of the season, Floral Explosion.

Trivia

 * Although Karen is most likely supposed to resemble Kaoru from Pretty Cure Splash Star, fans think she is more based on the character Zakuro Fijiwara from the other shoujo-series Tokyo Mew Mew. Both of them are the oldest and most serious of the group, very stoic compared to the others and were the last one to join the group after two episodes.