Cattail is thin, with brown scales and wings that have dappled patterns of paler brown scales on them. She has brown eyes like Clay's, with a ring of yellow around the black slit of a pupil, and her laughter is a high croaking sound like a thousand bullfrogs yelling at once.
Not much is shown of her personality, but it can be inferred that she is lazy, careless, and irresponsible. She was quite unconcerned about selling Clay when he was an egg and did not seem to care for him when they reunited in The Dragonet Prophecy; and though he said she wasn't trying to be mean, it was still clear that she did not want him and did not consider any of his shocked feelings.
Cattail had Clay and his siblings' eggs after a breeding night in the outer region of the Mud Kingdom. Her sister, Asha, saw Clay as the potential MudWing dragonet of the prophecy, seeing as his egg was blood-red and would hatch on the brightest night. Cattail didn't care what happened to her eggs, like most MudWings, so she sold his egg to the Talons of Peace in exchange for at least two cows, and appeared to have no guilt or remorse towards the "delicious" deal, a typical MudWing trait being the love of food.
When Clay made his way back to her in the company of Glory, Cattail was irritated at his lack of knowledge about the traditions of MudWings. She also showed almost no attachment to her dragonets, which is common behavior for most MudWing mothers. This left Clay very upset, however, because his fantasies of his frantic mother and father were not true.
While flying towards the Kingdom of Sand, Sunny reflected on the families of the dragonets of destiny, mentioning how Cattail turned out to be awful while Clay's siblings were more welcoming and kind to him.
Cattail seems to have cared about her sister, having been distraught after learning that Asha had died shortly after delivering Clay's egg and saying that their bigwings would be furious. Despite this, she also commented that her sister had been "softhearted and mushy about crazy things," and had loved to preach about the prophecy and peace to the other dragons of their village. Cattail remarked that "She left a lot of blithering, dreamy-eyed dragons behind in this village." After finding out that Asha had died, Cattail had also told Clay and Glory that it "served her right" for choosing the Talons of Peace over her own kin.
Though Clay, while growing up under the mountain, had many fantasies about his mother and father who he hoped had cared about him and been frantic when his egg was "stolen," Cattail, like many MudWing mothers, didn't seem to particularly care about her dragonets, and didn't even know who their father was. She sold Clay's egg to the Talons of Peace for a couple of cows, later telling Clay "There were six other eggs in the hatching. They didn't need you."
"That's Asha, all right, […] She was always softhearted and mushy about crazy things. She loved mooning around little dragonets, telling the story of that prophecy. She left a lot of blithering, obsessed dreamy-eyed dragons behind in this village, let me tell you; they still won't shut up about destiny and peace and all that."