Hatsune, a playable mage affiliated with the Forestier guild, wields supernatural abilities balanced by her fondness for lengthy naps. She is recognized as Shiori’s elder sister, though details of their shared history remain undisclosed. Specializing in offensive spellcraft, her stat distribution prioritizes overwhelming magical force: at maximum ascension (6★, Level 227, Rank 22 Equipment), she commands 25,719 magic attack and 1,675 magic critical points. Defensive metrics settle at 460 physical and 524 magic resistance, while her combat rhythm features 2.07-second attack intervals, 755-unit reach, and 450-unit movement speed.

Her Union Burst, "Shooting☆Meteor," hurls meteors to strike all enemies, dealing moderate magic damage intensified against physical-oriented targets. This cataclysmic skill inflicts heavy magic damage, shreds enemy magic defense, and immobilizes foes for six seconds. Its potency escalates with both level progression and accumulated magic attack stats, cementing her niche as a dedicated anti-physical specialist.

Bond progression amplifies her arcane dominance, granting up to +200 magic attack and +30 magic critical at bond level 12. Alternate variants like Hatsune (Summer) and Hatsune & Shiori introduce hybrid stat boosts, blending physical and magical enhancements while maintaining her core identity. Her guild ties, sibling dynamic, and meticulously tuned combat parameters define her documented profile.