Nun

The Nun was in charge of the Santa Maria Convent where Leonardo da Vinci tricked Teresa de' Medici into meeting the fictitious Princess of Naples who she wanted Lorenzo to marry.

Biography
Pretending to be from pest control, Machiavelli tricked the Nun and her colleagues that there was a huge rat infestation at the convent. The Nun was sceptical until he showed her two rats in a cage. He told her and the other nuns to wait in the tower while he smoked them out, and told them not come out under any circumstances until he told her to. Mac later realized he had forgotten to tell the nuns to come out which the gang laughed at. (Hitched)

Personality
The Nun was sceptical about the pest control and stubbornly refused as the bishop hadn't informed her but when she saw the rats was shocked and was happy to let them do their thing.