Chiyu is a laid-back second year middle school student with a lighthearted yet stern personality. An older sister type who will look out for you no matter what, she has a strong sense of responsibility and is an ace of the school's track and field team. On top of that, she is smart, especially with science, and is sporty, especially when it comes to high jump. She can transform in her alter ego, Cure Fontaine, the Pretty Cure of water, by the power of Pegitan.

(Source: Pretty Cure Wiki)