Rick Sanchez (Rick and Morty)
He is formally referred to as Rick Sanchez C-137 (alias: "Terror Rick") by the Trans-Dimensional Council of Ricks, in reference to his original universe, "C-137", and penchant for instigating wars with inter-galactic empires. Both Rick and Morty are voiced by Roiland. Volume 1 of the "Rick and Morty" comic series follows the Rick and Morty of Dimension C-132 while most issues of subsequent instalments follow the Rick and Morty of "C-137"; the video game "Pocket Mortys" follows the Rick and Morty of C-123.
Meeseeks and Destroy
After a particularly traumatic adventure, Morty wants to quit all future escapades. Morty strikes a bet with Rick to lead his own adventure, agreeing to cease complaining if he fails, and Rick agreeing to let Morty choose every tenth adventure if he succeeds. When the rest of the Smith family asks Rick for solutions to several mundane problems, he gives the family a Meeseeks Box, a gadget capable of causing helpful beings named "Mr. Meeseeks" to materialize each time its button is pushed. These identical and short-lived creatures exist only to execute the first order they are given; once it is completed, they vanish. Rick warns the family to keep their tasks simple.