Conversation so far:
What was Grigory Potemkin's personality like?
Potemkin exuded both menace and welcome; he was arrogant, demanding of his courtiers and very changeable in his moods but also fascinating, warm and kind.
So Grigory Potemkin could be nice too?
Yes, Gregory Potemkin exuded both menace and welcome.“

Question: What did others have to say about his personality?
Self-contained rewrite: What did others have to say about Grigory Potemkin's personality?