Bellatrix - Helena Bonham Carter, one of my favorite actresses of all time.
To disperse all hate and praise comments about Snape, JK Rowling herself even states that he is a bit of both. He wasn't a good person because of the things he's done leading up to his death, nor was he bad because of the sacrafice he made. Everyone is entitled to their own opinion but maybe everyone should just forgive like Harry did by naming his son after him. If anyone's still confused read the article please and thank you.