Catchy

"'A spirit that loves music. It is naturally attracted to people who sing.'"Humming, also known as Catchy, are Sound element Seirei that are recruited by giving them Harmonic Gold Coins. If the player has Arancia Scorenote in their party, and an Ocarina in their inventory, the amount of Coins needed to recruit them will lessen. Humming can be selected as the starter Hero/Heroine element for a medium difficulty. Its special power puts enemies to sleep.

They appear as orange blinking musical notes in-game.
 * Beats: Flint
 * Fears: Slash, Nirva