A Cloudian is a rare species Dandy attempts to capture in Season 2, Episode 6. They are suggested to have some sort of connection to the internet (and the Cloud, thus their name) They also travel on large "Clouds"- homes that travel through space much like a spaceship. Dandy targets a Cloudian known as "Gentle Nobra."
Honey is found to be half-Cloudian, by the name of Lady Nobra. She is the younger half-sister of Gentle Nobra. She does not, though, have a Cloud of her own.