Meisner is not torturing Sean. He is his conscious making Sean deal with what he did. Meisner keeps telling him Sean you picked the wrong side. Why Sean does not realize Meisner is right and accept the fact that Meisner is right.
What is interesting was Diana asking if her daddy was one of the people that hurt Meisner. Diana like Meisner. She remembers the helicopter. I am surprised they did not have her remember Meisner was there when she was born. It seems strange to her Adalind talk about when Diana was little as if it was long ago. They why the characters distort time is amazing. They all act as if at has actually been 10 years since Diana was born. None of them see her aging as abnormal.