Mr Heckle
Mr Heckle and Doctor Jeckle were the joint leaders of the Mob of the Maroon Magpie in the Prime Universe.
Originally a pair of ordinary magpies, they were captured by Professor Scarper and his robot assistant and mutated into anthropomorphic beings in order to be presented to Scarper's First Horde overseers as a proof-of-concept for Scarper's proposal of using mutated animals as operatives. The two magpies also received their names from Scarper, who was a noted enjoyer both of classic science-fiction novels and of classic cartoons. (PROSE: The Salamandyrs and the Automata)
They were personally present in 1994 during the Mob's first encounter with the Crew of the Copper-Colored Cupids. (PROSE: The Mob of the Maroon Magpie)
Behind the scenes
The two magpies' names are a double pun, simultaneously referencing Doctor Jekyll and Mr Hyde and the classic cartoon magpie characters Heckle and Jeckle.