Annin

アンニン

Annin serves as the guardian of the sacred Furnace of Eight Divisions, which marks the border between life on Earth and the Other World. She is one of the few beings working under King Yemma who does not appear to be an ogre, instead possessing a somewhat human physical form. Annin is immortal and presumably ageless.
Biography
Annin is the sole pyre keeper of the Furnace of Eight Divisions, a position she has held for over ten thousand years. Due to this fact, she is indeed very ancient, despite her attractive and youthful appearance.
Goku confronts Annin regarding the flames violently erupting on Fire Mountain, which had threatened to obliterate both the Ox-King and his entire village, to propose a hasty solution to extinguish the fires. Annin rejects this request with the sole intent of preventing demons from escaping the Other World premises, as extinguishing the flames even for a momentary period would permit them total access to the world of the living.
Goku, of course, refuses to drop his request and persists in attempting to convince Annin otherwise; this eventually leads to a brief bout between the two, during which Goku discovers her true age and unintentionally mocks her for it. Enraged by Goku's insolence, Annin transforms into a giant to pulverize the miniature-sized hero, employing various methods in doing so (such as using her headpieces to attempt to stab Goku, as well as the gales caused by the flapping of her cape). Goku manages to counter her furious attacks due to the unrelenting power and force of the Bansho Fan, which consequently shocks Annin at its convenient and sudden presence.
Annin soon suggests an alternative method of extinguishing the flames, guiding Goku through the flames of the Furnace of Eight Divisions to quell the fire and thus save the Ox-King and his village. Following her appearance, Annin is never seen nor mentioned again.