Colonel Olrik is the perennial antagonist of the Blake & Mortimer comic book series. He first appears in the three part epic "The Secret of the Swordfish" (though this is not the first time he confronts Blake and Mortimer in the comic's timeline). He has appeared in every book of the series except for "The Time Trap" and "The Oath of the Five Lords". When he is first introduced to Blake & Mortimer he is said to be from Central Europe but not much else is known about him outside of his exploits throughout the series.
He sometimes acts as the main villain, but is often a willing, reluctant or coerced aide to the primary antagonist. He is shown to be a consumate actor, and like Blake is able to use disguises that are good enough to fool Mortimer. Known to be extremely ruthless, he has killed numerous other characters during the series and has no qualms in leaving his fellow villainous associates to fend for themselves when he is forced to flee when his plans inevitably go awry. He displays huge confidence in his abilities despite repeated setbacks and imprisonments (mainly at the hands of Mortimer) and is an experienced hand to hand fighter.