Doll Devil (Arusity)

Small Outsider (devil, evil, extraplanar, lawful)
Hit Dice: 2d10+2 (13 hp)
Initiative: +2
Speed: 30 ft.
Armor Class: 15 (+2 Dex, +2 natural, +1 size), touch 13, flat-footed 13
Base Attack/Grapple: +2/+1
Attack: Slam +2 melee (1d3)
Full Attack: 2 slams +2 melee (1d3)
Space/Reach: 5 ft./5 ft.
Special Attacks: Draw Essence, spell-like abilities
Special Qualities: Darkvision 60 ft., see in darkness, telepathy 100 ft., resistances, immunities, inert
Saves: Fort +1, Ref +5, Will +5
Abilities: Str 10, Dex 15, Con 12, Int 13, Wis 14, Cha 17
Skills: Acrobatics +7, Appraise +6, Bluff +8, Disguise +8 (+18 while inert), Escape Artist +9, Perform (dance) +5, Stealth +13
Feats: Stealthy
Environment: Any (Hell, urban)
Organization: Solitary
Challenge Rating: 1
Treasure: Standard
Alignment: Always lawful evil
Advancement: 3–4 HD (Small); 5–6 HD (Medium)
Level Adjustment: —

A Doll Devil, known among infernal scholars as an Arusity, appears as an exquisitely crafted porcelain doll - delicate, pale, and eerily lifelike. Its proportions are childlike, its features soft and inviting, yet its glassy eyes possess an unsettling awareness that betrays its true nature. Though most manifest in feminine forms, rare masculine variants exist, often exhibiting more overtly cruel tendencies.

Doll Devils do not speak aloud. Instead, they communicate through telepathy, their voices slipping directly into the mind as soft, reassuring whispers. These voices are never random - each is carefully shaped to match the listener’s expectations, desires, and emotional vulnerabilities.

Rather than relying on brute force, Doll Devils specialize in subtle psychological manipulation. They embed themselves within environments of comfort and quiet dissatisfaction, most often among children who possess material abundance but lack emotional fulfillment. From this position, they begin their work.

Over time, the Arusity nurtures selfishness, envy, and emotional isolation. It rewards cruelty, excuses harmful behavior, and gently erodes empathy. By the time its influence is fully realized, the victim is often unrecognizable from who they once were.

Combat
Doll Devils avoid direct confrontation whenever possible. They rely on deception, misdirection, and their ability to remain unnoticed. If forced into combat, they use their spell-like abilities to confuse and unsettle opponents while seeking opportunities to withdraw.

Draw Essence (Su): Once per day, a Doll Devil can draw out the emotional and spiritual vitality of a living creature with an evil alignment. The target must succeed on a DC 14 Fortitude save or take 1d3 points of Charisma damage. The save DC is Charisma-based.

Inert (Ex): A Doll Devil can enter a dormant, doll-like state as a standard action. While inert, it is indistinguishable from a normal doll at a casual glance and does not radiate an evil aura. A creature examining the doll must succeed on a DC 20 Perception check to recognize it as alive. While inert, the Doll Devil gains a +10 bonus on Disguise checks and cannot take actions.

Spell-Like Abilities: Caster level 2nd. The save DCs are Charisma-based.
At will - giggle (DC 13)
1/day - friendly face (DC 14), hot foot

Ecology
Doll Devils are not summoned through conventional magic. Instead, they are drawn to the Material Plane by emotional imbalance - specifically, the hollow craving that arises when desire outpaces need. This phenomenon creates a subtle metaphysical resonance that these devils can perceive across planar boundaries.

When such a resonance becomes strong enough, an Arusity manifests nearby, often in the form of a toy or cherished object. From there, it integrates itself into the victim’s life with disturbing ease.

Once the victim has been sufficiently corrupted, the Doll Devil begins feeding directly, using its Draw Essence ability over time to drain emotional and spiritual vitality. This process typically ends in death or a coma-like state, at which point the Arusity claims the soul and returns to Hell.

Lore
Characters with ranks in Knowledge (the planes) can learn more about Doll Devils.

DC 11: Doll Devils can disguise themselves as toys or comforting objects to approach victims unnoticed.
DC 16: They feed on emotion and personality, gradually eroding empathy and strengthening selfish tendencies.
DC 21: While inert, a Doll Devil does not radiate evil and is extremely difficult to distinguish from a mundane object.
DC 26: They are most commonly found in wealthy households, where emotional neglect creates ideal conditions for their manifestation.

Originally from here and modified