The Deca-- for those who don't know-- was the Doctor's group of friends at Prydon Academy.
Top row, left to right: Drax, Vansell, Jelpax, Mortimus (the Monk), Rallon (possessed by the Celestial Toymaker), Millennia.
Bottom row, left to right: Magnus (the War Chief), Ushas (the Rani), Koschei (the Master), Theta (the Doctor).
And I almost forgot.... The inspiration for these robes came from
's sketch of Theta, Koschei, Ushas, and Drax. I'd looked at all the different designs artists had come up with, cause I didn't even know where to start. There were some I really liked, but they were different for girls and boys, and I didn't imagine the Time Lords doing that. Then I found that drawing, and it sparked a design.
Doctor Who copyright to the BBC. Art copyright to me.