Aether, as a primordial deity, is often not depicted with a specific physical form. He is usually represented as a concept, the pure, luminous substance that fills the celestial realm above the Earth, rather than a personified being with distinct features.

However, if we consider the attributes and qualities associated with Aether, we can imagine him as a powerful, luminous being:

* Luminous: Aether is often described as being radiant and bright, embodying the light and brilliance of the heavens.

* Immense: As the substance that fills the entire cosmos, Aether is likely to be vast and boundless, representing the vastness of the universe.

* Pure: Aether is often associated with purity and perfection, representing the pristine and unblemished nature of the celestial realm.

* Fluid and Ethereal: Since Aether is the substance of the heavens, he might be imagined as flowing and dynamic, representing the constant movement and change in the celestial sphere.

It is important to note that these are interpretations based on the nature of Aether. There is no established, definitive physical description of him in classical Greek mythology.