Actually I must say that I didn't understand the second question at all ...
He asked if once you finished you can restart D2:ED with the same character you were playing with, but with an increased level of difficulty.
Okay, I understand it now.
I had thought he meant he wanted to play with the Divinity 2 character in Blizzards D2 ...

But me, I don't like that. But that's my personal preference.