Umiae tend to have the basic body structure of a quadrupedal form with a short tail, limbs with small claws, a moderately long neck, and a round head with antennae. They are typically the size of big cats on Earth (including the "large small cats" like cheetahs and cougars). 

The dorsal (top/back) part of their body is typically black but can be other colors, and the underbelly is typically a dull color that does not glow. Their dorsal portions are covered in structures vaguely resembling fur-like feathers in several layers; these pseudo-feathers individually have a springy texture and offer a notable degree of resilience to physical attacks and a minor degree of protection from harmful magic. The pseudo-feathers often form tufts at their head where their antennae are attached. These pseudo-feathers might fluff out when startled or to regulate temperature. Their bellies are a softer, skin-like material. Unlike umin, they commonly do not have markings. 

Unlike umin, they have a distinct sclera and lip of the same color as their inner flesh. Typically, it is a darker shade of their belly color but may have a more saturated color. They have large round eyes with glowing white irises and a large pupil that is typically their belly color. If the pupil is a light color, it may also glow. Their teeth are not retractable and can often be seen even with a closed mouth. Their mouths typically come to a slight point. 

The antennae are fairly sensitive, capable of providing feedback on touch, taste, smell, and magic detection. They tend to strongly dislike their antennae being pulled and will attack at an attempt to do so.

Umiae have proper flesh and internal anatomy, including a heart, lungs, and other organs along with a skeletal system. They have blood that is typically a dark grayish-blue color, though this color can change. They produce saliva, but do not sweat. They eliminate both liquid and solid waste if they drink fluids or eat, respectively. Some are more efficient at processing the gaseous magical essence of Namu and do not need to eat as often, and thus do not eliminate waste as often. 

Modern Umiae

Through the involvement of beings who came from beyond Namu, some Umiae have survived to the present day (or perhaps brought to the present through time travel), though their numbers are few and they have variations in their characteristics that allow them to survive beyond Namu. Many are in contained areas, though some have been released to ecosystems that they are able to survive in. 

Some have been biologically or magically modified to rely on a different type of magic or no magic to be healthy; some lines achieved this through selective pressure of survival. Those who do not absorb any magic need to eat more and their magic-sensing abilities are very weak. Some have develop more complex intelligence over eons, while others are still more animal-like in nature.

Umiae have patterns of anatomy variations similar to umin, and these are generally traited at the same rarity. For the most part, "unusual" traits are anatomical changes while higher rarities are color changes. 

The following characteristics are considered standard: 

• one belly/pupil color 

• sclera/lip/inner flesh color that is darker than belly color, with or without a slight hue/increased saturation 

• 2-3 claws on each foot; forelimbs can have a different number from hindlimbs 

Unlike umin, umiae do not have versatile magic, so belly colors are visual only and do not affect their abilities. 

Unusual ◇

There is no formal trait list—any minor anatomical change you can think of could be possible—so long as an umius is still recognizable as one. Here are some unusual traits that are unique to umiae: 

• shortened limbs  

• round toes

• no toes/claws

• multi claw: more than 3 claws on feet

• sleek pseudo-feathers: no distinct fur-like tufts

• bipedal: all limbs are present but only one pair is used for walking

Otherwise, traits are similar to those of umin. 

Rare ⬘

Most traits follow the umin traits, with a few different traits: 

• colored mouth: the inside of the mouth is a color other than the standard coloration. 

• belly glow

• belly markings (must be body-color if not specified as "colored") 

• body markings (must be belly-color if not specified as "colored")

• colored blood

Anomalous ◈

Typically, colors and patterns with very few limits with some "anatomical" traits. These more or less correspond to the umin anomalous traits. 

Aberrant ❖

These are traits that fundamentally change basic umiae appearance and anatomy, and may alter certain functions. Umiae cannot be born with these traits, but there are rare cases in which they absorb excessive amounts of foreign metaphysical energy and undergo a transformation. They do not gain versatile magic "slots" from aberrant traits, but they can gain control over the "element" of their composition change.