U is for Umu, Uttuku

Here are some I worked up for Ghosts of Albion.

Umu Demons (Ghosts of Albion)
Motivation: Guard dogs
Critter Type: Demon (Guardian)
Attributes: Strength 4, Dexterity 5, Constitution 4, Intelligence 3,Perception 7, Willpower 4
Ability Scores: Muscle 14, Combat 15, Brains 16
Life Points: 48
Drama Points: 3
Qualities: Hard to Kill 2, Armor Value 2, Acute Senses
Drawbacks: Attractiveness -4, Honorable (Rigid)
Skills: Armed Mayhem 4, Fisticuffs 3

Combat Maneuvers
Name Score Damage Notes
Big Sword 9 25 Slash/stab, can use one-handed
Bite (2) 8 17 Must Grapple first
Punch 8 8 Bash
Kick 6 10 Bash
Dodge 9 - Defense action
Grapple 8 - Resisted by Dodge

Umu Demons (OSR/Basic/S&W/D&D)

Hit Dice: 8
Armor Class: 3 [16]
Attacks: 2 claws (1d6), 3 bites (1d6) (only three heads may attack at a time)
Special: Magic resistance (45%), regenerate (1 hp/round), never sleeps, never surprised
Move: 24'
Save: 10
Alignment: Chaotic Evil (Chaos)
Challenge/XP: 8/900

Lower level demons employed by the Utukku, Umu demons act as guard dogs-a job they are perfectly suited for. Each Umu demon stands 6' to 7' in height. Their skin is covered with a fine dark fur, often black or dark brown. They are very muscular and often dress in ancient Babylonian or Sumerian garb; open toe sandals, papyrus kilts and bare chested. What sets these demons apart are their four heads. The heads most often resemble that of a Doberman, but some have been reported with jackal heads as well. All faces feature prominent snouts with dozens of needle like teeth. Each head faces a different direction, thus the Umu is never surprised. Their senses are as acute of that of a dog's (sharper sight, hearing and smell) only four times over. They are loyal to their demon employers and thus very much in demand by those that have things they want guarded. Each head is independent of the other. So heads can eat, carry on conversations and even sleep separately of the others.

Umu typically kill and eat anyone that comes too close to the thing they are guarding, making no distinction between friend and foe. Only their employer, the demon or witch that bound them are immune to their attacks.

There is also a rumor that there are three-headed varieties that serve the Goddess Hecate.

Utukku, Utukki
These fiends appear to be large satyr like humanoids.  They stand 7’ tall on the hind quarters of a goat, but upper body of man.  Their faces, while human-like have characteristics of both lion and goat.  Their horns are large and goat-like, and their heads are covered in thick wholly fur that resembles a mane.  Their teeth and claws are very sharp.
In areas where these creature roam free frighten villagers often sacrifice their virgin daughters to appease them.  Sometimes the poor unfortunates return to their villages traumatized and  bearing an awful child in their wombs.  These demons are quite powerful and fairly high in the demonic hierarchy. They only begrudgingly take orders from Marilith and Balor.  All others they see as beneath themselves.    Utukku are related to the Umu demons and have completely subjugated them.  The Utukku allow the Umu to be summoned by other demons and human magic users for a task.  An Utukku can summon up to 1-3 Umu demons per day.

Utukku

Hit Dice: 11
Armor Class: 1 [19]
Attacks: 2 claws (1d8), 1 bite (1d8)
Special: Magic resistance (45%), regenerate (2 hp/round), shape change (human), +2 or better weapons to hit.
Move: 24'
Save: 12
Alignment: Chaotic Evil (Chaos)
Challenge/XP: 11/1500

The Umu and the Utukku are both in the service of Tiamat and other Eodemons.

http://en.wikipedia.org/wiki/Utukku