Ragnorr

From Tardis Wiki, the free Doctor Who reference

Ragnorr was the brainleader of the Kreech.

When the Eleventh Doctor and Amy Pond were taken prisoner by the Kreech, seeking freedom, made the Doctor a reluctant king to the Kreech. The Doctor managed to trick Ragnorr into continuing his powerful reign on Unsunru. (COMICThe Cleverest King)