Mara is a Buddhist demon in the shake of a dick chariot. He is one of the larger villains around but is also less mobile. He is also very arrogant and thinks highly of himself.
When he tried to attack Glack it ended in silly failure. Due to his shape and size, Glack loves to use Mara as his personal chariot.
Like Beelzebub and other known demons, the RUC tends to ignore them which Mara finds humorous.