Lonnie

Lonnie was a german citizen of Rapture and one of Atlas's henchmen who became trapped in Fontaine's when Andrew Ryan had it converted into a prison and sunk to the bottom of the sea. He escapes the prison along with the rest of Atlas's followers and continued to work for him during the Civil War.

Episode 2
Lonnie is first seen when Elizabeth regains consciousness in the Toys department. He cruelly plays russian roulette with her while Sally is taken captive. When Atlas see's that she is still alive he orders Lonnie to kill her quickly. This almost happens but Elizabeth offers to help them escape just before the trigger is pulled.

When the Lutece Particle is successfully used to float the Housewares building back up to the city, Elizabeth is knocked out by Lonnie when he uses chloroform on her. The day after the Riots, he attempts to extract the location of the Ace in the Hole from Elizabeth using truth serum, but he administers too much and sends her into a comatose state for two weeks.