Adventurer Cookie is Blackberry Cookie's employer, though he is often seen avoiding her due to her duties in stifling his recklessness. He also seems to have some connection to Onion Cookie Onion Cookie, though it's very vague why.

Adventurer is constantly trying to sneak  out on adventures, despite his personal maid's determination to stop him, almost like an endless chase.

He's sweet and charming though, he loves blackberry and onion like his own family. He is a very nice and friendly man.