Before Thallius was essentially yote and bamboozled from events, he used to have wings.

Before he has lost his wings, Thallius had large lavender moth-like wings. There was a velvety texture to them, and light hues of greens and blues to accompany them, as well as black and white speckles at the base and the tips. There was also an eye pattern on the tips of the fore wings and the hind wings. On the base of his hind wings was a lace of black with multiple small swirly patterns extruding from it.
While his wings were pleasant to look at, they hardly served as a practical purpose, and were better used cosmetically or looking appealing. Thallius wasn't able to fly with these wings. While they could flutter when he was feeling any intense emotion or to make a purring noise, they didn't do much for travel. He could occasionally lift himself off of the ground, but this wasn't something that would last long.