Twin-Tail is the A-class 11-ranked pro-heroine, working for the Heroes Association. She is a tall, fair-skinned lady, dressed as a jester, blindfolded, and with two huge pigtails in her hair. She's very confident on her abilities, as well as rather morbid. While fighting she juggles her multiple accessories popped out of her suit which she uses to kill monsters, those accessories are called "Hidden Tools" and these ibcludes pins, balls, and scimitars.