|Current residence||Düsseldorf, Germany|
Theresa Erzberger was a horse jockey of the Lahnsteins, training for the Lahnstein Derby with the horse Dionysos. She was the co-worker of Dana Wolf, whom Theresa competed with for participation in the derby, Christian Mann, with whom she had a short relationship, and Hagen von Lahnstein, who was also her boss. Close before the race, Theresa was offered a deal by Ansgar von Lahnstein, who wanted her to dope Dionysos. She was caught doing it by Marlene von Lahnstein, Dana's sister, and reported it to Hagen. Hagen then fired her. But Theresa got to race for another team in the Lahnstein Derby, and got second place.