|This is part of the Sky Pretty Cure Series!|
|Season||Sky Pretty Cure Series|
|First Appearance||Sky Pretty Cure 05|
|Element||Water & snow|
Blue is a mascot from the Sky Pretty Cure Series. Blue is a creature from Skyriver. He is Sapphire's transformation partner. He ends his sentences with "~ao". Blue gives Sapphire the power to transform into the Pretty Cure of water, snow and talents.He has a light blue mark on his forehead. The mark looks like a snowflake.
- White - Blue's sister.
Blue (ブルー?) - Blue is the color between violet and green on the optical spectrum of visible light. In traditional color theory, blue is one of the three primary colours of pigments, along with red and yellow. The modern English word blue comes from Middle English bleu or blewe, from the Old French bleu, a word of Germanic origin related to Old Dutch, Old High German, Old Saxon blāo and Old Frisian blāw, blau.
- Blue shares his name with Blue from Happiness Charge Pretty Cure!.
- Blue is the third mascot to have an older sibling. The first were Lullun from Futari wa Pretty Cure Max Heart, Candy from Smile Pretty Cure!.