In the movie adaptation of Valerian and Laureline, Bob the Pirate is a very lively and eye catching character.
Is he a Besson creation, or can he be found in the original comics material?
Bob the Pirate is a creation of Luc Besson. But there is a somewhat similar character in the comic book that most likely inspired this character.
The character in the comic book arrives in a boat right after Laureline has used the caught jelly fish (there is no captain in the mini sub in the comic), he is a former space farer that now is poor, and has many mechanical implants, he sells info about another species that might help in her quest to find Valerian.