Mirabo & Maribo

Mirabo is one of the Twin Maidens of Fire. She was used to (incompletely) power Riesling's pyroclastic modulator in Mt. Terroir, after she and her sister tried to calm Moltan. She's spunky and light-hearted, and has an obvious crush on Musashi.

Maribo is the other Twin Maiden of Fire. While her sister was imprisoned on Mt. Terroir, she was sent to the Nebulium Tower where Mycella was kept. She's calmer and clever, with her crush on Musashi being more subtle.

Although they're both Fire Maidens, on their own they each only have half of the full power a different maiden would've had, due to their smaller size & younger age. They must both be present in order to awaken the Sword of Fire's hidden power.

Trivia

 * Mirabo's theme is "Symphony of Fire I", while Maribo's theme is "Symphony of Fire II".