|Books character||TV character|
When Fred Johnson leaves Tycho Station in Nemesis Game, Drummer confides to Holden that she is nervous about the "Old Man" leaving.
When Fred Johnson dies in Babylon's Ashes, Drummer becomes the acting head of Tycho Station and its people. Stylizing herself after Fred Johnson, Drummer maintains a close relationship with Holden.
- At the time of Nemesis Games, Fred Johnson says he has been working directly with her for 3 years and knew about her 10 years before that.