I finally got to see "Two days and two nights" last night. There are quite a few Risans in it.
Apart from the jewel or tattoo on the forehead, they look practically human. They could be a race in their own right, or possibly descendants of a colony of another race. The Great Bird knows there're enough humanoid races in that part of the galaxy!
(In my RPG series, using a combination of FASA's and Coda's Orions, they'd be a colony of Ruddy Orions taking advantage of a perfect holiday world...)
Jon
"There are worlds out there where the sky is burning, where the sea is asleep and the rivers dream; people made of smoke and cities made of song.
Somewhere there's danger, somewhere there's injustice, and somewhere else the tea is getting cold. Come on, Ace, we've got work to do."
THE DOCTOR, "Survival" (Doctor Who)