My take on my universe, not All Tomorrows character but similar vibe. Hope your guys like ! You found yourself visiting an exomoon, named Alegvanio after a strange, pale guy you met offered to take you to his world. As you and he stepped into the Curtain, you saw a deep layer of fog covering the world like a universal-level veil, whispering with the voices of trillions of bacterial individuals within it. This is the Fog — one of Alegvanio's weirdest creatures.

It's a giant, ghostly, cloud-like organism composed of trillions of microscopic, bio-engineered E. coli, originally created to refresh the moon’s atmosphere, which once suffered from chronic air pollution. However, the Fog has since changed its diet — shifting from consuming greenhouse gases to devouring dead skin cells, as well as pond scum, acne, and bacteria on locals that could cause wound infections.

Despite its unsettling diet, the Fog plays an important ecological role, serving as a food source for many creatures on Alegvanio. One such creature is the Skyrunner — a gallimimus-like, fog-eating animal with a whale-like beak designed specifically to consume the Fog, makes the Skyrunner becomes a combination of ratite-like running fragile theropod and ground but small baleen whale.

After the strange guy's explanation, you stared at the Fog, with a bewildered eyes, as the Fog flied over you and the Traveller.