Mahoutsukai Precure!

Synopsis

With the girls' usual teacher absent, Riko's older sister, Liz, oversees their next test, in which they must use their wands to manipulate water into shapes. While the other girls work on maintaining shapes of things they care about, Riko seems determined to match Liz' advanced shape of a performing elephant, becoming frustrated when she is unable to pull if off. Riko tells Mirai how she had always admired her sister, who gave her her Diamond pendant, but always struggled to live up to her expectations. Just then, Spalda attacks with an Hourglass Yokubal, injuring Liz in the process. Stating her feelings to protect her beloved sister, Riko uses the Aquamarine Linkle Stone to cast freezing magic on the Yokubal, allowing her and Mirai to defeat it. Afterwards, as the other girls manage to pass their tests, Riko is able to create a frozen pendant, earning praise from Liz.

(Source: Wikipedia)