Mother Nature

Despite their closeness, Lady Parthia was still the fallen queen of a nation he had just conquered.

So although Alexander trusted and respected her, he also held a certain amount of weariness. It was an almost instinctual feeling. 

He did not fear an outright betrayal, that would be simply being paranoid. 

But being taken small advantage of here and there… Alexander wanted to avoid that. 

"Heh!" While, as if sensing Alexander's insecurities through his shaking lips, Lady Parthia for a second let out a small mocking smirk, before quickly restoring her facade.

Following this, Alexander spent a little more while discussing a few more tedious details, such as when Lady Nanazin was to start, the features of the renovated mansion Alexander had prepared to be the main headquarter of the bank, as well as a few advertisement campaigns he had already arranged for her.