Hiyama Aiko

Hiyama Aiko (火山あいこ) is the lead Cure in Miracle Colors Pretty Cure! Her alter ego is Cure Heartbeat (キュアハートビート) and she represents the color red. Her catchphrase is "I won't lose!" (負けないよ!)

Etymology
Hiyama (火山): Hi (火) translates to "fire, flame, blaze." While the one who has fire powers in the team is Inferno, fire tends to be associated with red, Heartbeat's theme color. Yama means "mountain."

Aiko (あいこ): Though it is written in hiragana, the intended meaning for Aiko is "child of love," with Cure Heartbeat representing courage and love.