Aqua (アクアAkua?)
Jewel: Aquamarine
Species: Clownfish
Gender: Male
Jewel Power: Calm Reliever
Attribute: Magical Blue
Voiced by: Yakkun Sakurazuka

Aqua is Naoto's Jewelpet partner. He's a natural-coloured Clownfish who symbolizes calm relief and wears a chain of blue jewels on his head. Debuting in Episode 21, Aqua is one of the most unique Jewelpets in Jewel Land due to his species. He also understands what Naoto is feeling sometimes. Because of his personality, he hates being called a goldfish and goes angry and berserk, sometimes growing bigger in size. Also, he's the second Jewelpet who doesn't use a broom to fly. He reapears again in Jewelpet Twinkle, now living in the seas surrounding Jewel Land. He appears on Jewelpet Sunshine and a friend of princess(who is a shark). His birthday is on March 26 and his name is based on the jewel Aquamarine.