'Ronan the Accuser' is a member of the alien race the 'Kree', debuting in Marvel Comics' "Fantastic Four" (vol. 1) #65 (1967), created by writer Stan Lee and co-plotter/illustrator Jack Kirby.
Born on the planet 'Hala', capital of the 'Kree Empire' in the 'Greater Magellanic Cloud', Ronan, as an adult, became a member of the 'Accuser Corps' military governors and jurists.
His rise through the ranks was extraordinary, and he eventually became the third-most powerful being in the Kree Empire. The 'Supreme Intelligence' appointed him 'Supreme Accuser of the Kree Empire', and in this role he is known simply as 'Ronan the Accuser'.
Ronan possesses superhuman strength, endurance, speed and reflexes, enhanced by devices in his suit of full-body exoskeleton armor.