Kang
From Tardis Wiki, the free Doctor Who reference
The Kangs were groups of young girls living inside the Paradise Towers. They were divided into groups by colour: Red Kangs, Blue Kangs and Yellow Kangs. The last Yellow Kang was killed shortly before the Doctor arrived on Paradise Towers. (DW: Paradise Towers)
- It is not mentioned in Paradise Towers whether there has been any other groups of Kangs than the Red, Blue and Yellow.