Triskaidekaphobe

The Triskaidekaphobes were a group of thirteen individuals who feared the number thirteen yet included thirteen in their number. They were led by Father Tragedy. They were clones and were the self-proclaimed unluckiest people in the galaxy. Bob Kreesus fed on all their luck and good fortune. They dressed in black Cowls of Gloom and lived in the Castle of Despair at the end of the overhang of ladders on the thirteenth moon of the thirteenth planet in the Thirteenth Galaxy, trapped until the Tenth Doctor and Rose Tyler arrived and changed their luck.

Known members of the Triskaidekaphobes included Father Tragedy, Brother Anguish, Brother Melancholy, Sister Misery and Sister Misfortune. (COMIC: Triskaidekaphobia)

Behind the scenes
The Triskadekaphobes get their name from the condition known as triskaidekaphobia, later expanded on in COMIC: A Confusion of Angels.