How is Monika Fellner described in the novel, The Amber Room?

Monika Fellner is sexy and dangerous. She is slowly taking over her father's business and this scares Loring. Monika does not play by the rules and would surely be a pain to Suzanne and Loring. Knoll sees Monika has a way to advance his own position. He thinks that she can use Monika to control the Fellner's company and money.