Obelix

Obelix is a sidekick with superhuman strength in the Asterix comic books. His job when not bashing Romans is as a menhir[?] delivery man. He has a little dog named Dogmatix.

Unlike all other Gauls in the village, Obelix has no need to drink the druid's magic potion, because he fell into the cauldron as a baby, making its effect upon him permanent.

This does not seem to have led to a general practice of infant baptism in magic potion among the Gauls.