Lover of Jean Tallien who is coerced into acting as Chauvelin's agent to kidnap Marguerite. She later delivers a critical arrest note to Tallien, helping rally him to denounce Robespierre and turn the tide of the Revolution.
Chauvelin uses Theresa as an operative in his plan to capture and punish his enemies.
Acting as Chauvelin's agent, Cobarrus kidnaps Lady Blakeney and brings her to Paris for trial.
Their romantic bond is closely tied to their shared opposition to the revolutionary purges.
The plot identifies Theresa Cobarrus as Jean Tallien's lover. They fear that Tallien will be arrested before they can act against the regime.
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