Futakuchi-Onna 二口女

Medium undead (yokai), chaotic evil

Armor Class 15 (natural agility)

Hit Points 95 (10d8 + 40)

Speed 30 ft.

STR 14 (+2) · DEX 16 (+3) · CON 18 (+4) · INT 12 (+1) · WIS 14 (+2) · CHA 18 (+4)

Saving Throws Dex +6, Cha +7

Skills Deception +7, Perception +5, Stealth +6

Damage Resistances necrotic

Condition Immunities charmed, poisoned

Senses darkvision 60 ft., passive Perception 15

Languages Common, plus any one regional language

Challenge 6

Traits

Dual Mouth (Cannot Be Silenced). The Futakuchi-Onna possesses two separate mouths—her normal mouth and the secret one at the back of her head. She cannot be rendered mute by any effect (magical or otherwise). Attempts to silence her fail to prevent her from speaking or using verbal components for spells.

Living Hair. The Futakuchi-Onna’s hair acts as a prehensile appendage controlled by the second mouth. Whenever she hits a creature with her Hair Lash, she can attempt to grapple that creature (escape DC 14). Until this grapple ends, the target is restrained, and the Futakuchi-Onna can’t use Hair Lash on another target.

Keen Smell. The Futakuchi-Onna has advantage on Wisdom (Perception) checks that rely on smell, reflecting her supernatural appetite and hunting instincts.

Actions

Multiattack. The Futakuchi-Onna makes two attacks in any combination of Hair Lash and Gnashing Bite.

Hair Lash. Melee Weapon Attack: +6 to hit, reach 10 ft., one target.

Hit: 9 (1d8 + 5) slashing damage, as the sharp tips of her hair whip out. If the target is Medium or smaller, the Futakuchi-Onna can attempt to grapple it (escape DC 14) as part of the same action.

Gnashing Bite (Second Mouth). Melee Weapon Attack: +6 to hit, reach 5 ft., one target.

Hit: 11 (2d6 + 4) piercing damage. If the target is grappled by the Futakuchi-Onna, this attack deals an extra 7 (2d6) necrotic damage as the hidden maw devours flesh and spirit.

Unsettling Lament (Recharge 5-6). The Futakuchi-Onna lets out a wailing cry from both mouths simultaneously. Each creature of her choice within 20 feet that can hear her must succeed on a DC 15 Wisdom saving throw or become frightened for 1 minute. While frightened in this way, a creature has disadvantage on Wisdom (Perception) checks and attack rolls against the Futakuchi-Onna. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Bonus Actions

Engorge (1/Day). The second mouth devours a significant amount of food or flesh, momentarily empowering the Futakuchi-Onna. Until the start of her next turn, she gains advantage on all Strength and Dexterity checks and saving throws, reflecting an unnatural surge of energy.

Reactions

Parry with Hair. When the Futakuchi-Onna is hit by a melee attack and can see the attacker, she can use her reaction to momentarily weave her hair in a defensive pattern, gaining a +3 bonus to AC against that attack. This can cause the attack to miss.

Lore & Behavior

Initially appears as a normal (even beautiful) woman, eating very little. Food stores around her, however, mysteriously vanish at night.

Her second mouth sometimes speaks truthfully against her will—especially about past misdeeds—leading to bizarre and conflicting statements.

Driven by hunger, she uses illusions or charm (if available) to lure lone victims into close quarters, then restrains them with her living hair.

Folklore holds that particularly cruel or miserly individuals might become Futakuchi-Onna after death, cursed with eternal hunger and a mouth they cannot silence.

Lore

Woman cursed with a ravenous second mouth hidden behind her head.

particularly chilling yokai Awhose name translates to “woman with two mouths.” At first glance, she appears no different from any ordinary woman—but hidden beneath the hair at the back of her head lies a second, razortoothed maw. This mouth often remains concealed under long strands of hair that can move with a life of their own, snatching up morsels of food.

Stories of Futakuchi-onna typically revolve around curses and retribution for greed. One well-known legend tells of a thrifty woman who spared no effort to economize. She married a man who already had a child. During a time of famine, she went so far as to starve her stepson in order to preserve what little food they had for herself. This cruel act would later doom her to a terrible curse. An accident befell the woman when her husband, chopping firewood, swung his axe too widely and nicked the back of her head. Though seemingly minor, the wound refused to heal. Over time, a second mouth appeared there, demanding food day and night and causing the woman constant pain. This gaping maw spoke relentlessly, soon confessing: “I killed a child! I was wrong, and now I am cursed!” Uniquely, the second mouth is said to be incapable of lying.

From Yokai Bestiary 5E, p. 54 · Fern Flower Press