Olaf is a 'retired government worker' under the name Otto Jefferies, according to Edward. He was a government spook, and is now a freelance assassin. He occasionally helps train anti-terrorist infiltration groups. As of Skin Trade, he is a federal marshal as well. He has an ID with the last name of Gundersson, although it's unclear whether that is his real name.
Olaf is extremely tall, over six feet, eight, and has to bend over to get through doorways. His body is broad and muscular, without an ounce of fat, and he moves like a well-oiled machine. He is completely bald, with heavy black eyebrows. His eyes are brown and set deeply into his face. He has a deep voice with a trace of German accent; he is originally form Hamburg, Germany. Olaf favors black clothing, even black pajamas, although it doesn't always fit perfectly as a consequence of wearing Jolly Green Giant sizes. He needs to shave twice a day to avoid 5 o'clock shadow.
Olaf operates from a black well of hatred, focused on women (Specifically petite, brunette women). It cripples him because it colors his reactions and makes him underestimate them. There is a question whether he desires more to kill women or to catch his prey. He can also turn the scary face on and off, and tune it to an understandable sort of scariness.
He lusts for the kill and the blood, and yearns to hunt with Anita at his side.
Olaf was imprisoned once for rape, and often brags about it. He has raped and killed other times, mostly outside of the United States. The government turns a blind eye to it, as long as he keeps his sprees outside US borders.
Olaf helps Bernardo Spotted Horse style his hair, very skillfully, but bristles when Anita makes a jest about being gay. He is seriously upset about the vampire feeding on Seth by sucking his penis, though he is aroused by the whippings. He plans to kill Professor Dallas if Anita doesn't come to check on her, but her arrival with Bernardo derails that plan.
He returns in The Harlequin along with Edward and Peter to help Anita fight the Harlequin. Since Obsidian Butterfly he has remained in close proximity to Anita hoping that she would contact him and they would hunt together.
In Skin Trade he joins Edward, Anita and Bernardo into hunting Vittorio. He also expresses his willingness to suspend his more creepy ways for the chance at dating Anita in a culturally acceptable fashion.
In Hit List he is turned into a Werelion after The Harlequin attempts to kill him and Nicky. He vanishes from the hospital soon after the blood work comes back. At the end of the book, he leaves a note for Anita explaining that he still wants her but it'll be on his terms so he won't be a "pet cat" like Nicky is.
Olaf is a covert spook, excels in hand-to-hand combat, knows "any weapon you care to name", and is better with explosives than Edward is, by Edward's own admission. He has been a special-ops assassin most of his adult life. He is also highly skilled in torture and the dismemberment of his victims.
He speaks several Middle Eastern languages.
Olaf uses a variaty of weapons from handguns to machine guns and knives. When working as a federal marshel he wears a cross from a holy man for protection.
- Olaf has a 'black file' with the government.
- He likes his bacon crisp.
- He does not like fire.