?

But on the face of the first one, it's written that she's a cunning one, and on the second one, that she's as simple as a forty-kopeck coin (this isn't a flaw in my opinion, if that's what you're wondering).

The first one, according to the lore, is a bit of a simpleton and doesn't have any particular talents besides her looks, which explains her envy towards her sister. The second one, according to the lore, is an intelligent strategist who makes well-considered and deliberate decisions.