Hummy, a petite feline fairy cloaked in snowy fur accented by a vibrant pink tail, carries an air of whimsy. Her wide, luminous eyes and a hairpin shaped like a musical note symbolize her identity as the Fairy of Songs, embodying the Melody of Happiness central to her purpose. Tasked with performing the annual Melody of Happiness, Hummy’s duty shifts when the antagonist Mephisto twists the melody into one of sorrow. Exiled to the human world, she embarks on a quest to reclaim the melody’s scattered notes, forging an alliance with Hibiki and Kanade during her search. Her magic manifests through sharp hand claps, channeling the power to purify corrupted Notes known as Negatones and retrieve lost Cure Modules. These actions anchor her role in mending discord and thwarting threats to harmony. As a steadfast mentor, Hummy guides Hibiki and Kanade through their transformations and battles, blending tactical aid with heartfelt support. Her unwavering commitment to restoring balance underscores the narrative’s intertwining of music, unity, and resilience.