Crismus Bonus is the first Centurion to appear in Asterix's world. He allows the authors to lay the foundations for their humorous take on Roman hierarchical organisation. Authoritarian (using one «volunteer» after another from among his legionaries to carry out his basest plots) and cruel (Asterix and Getafix barely survive a merciless - but hilarious - torture episode), Crismus Bonus is also extremely ambitious, as he works his way through a long list of officers hoping to take the place of Caesar.
Our Gauls, however, put short shift to his plans with their "fruitful" ideas, and made him become completely hair-brained (thanks to a hair potion from the druid which proves to be particularly spectacular). Julius Caesar himself tidies up matters by exiling the disgraced centurion to lower Mongolia.