Possible Clues:

• Her name is Greek for 'all-gifted'
• Mythical woman with a box of troubles
• Options Papa offers disobedient opener who might have helped 16
• Ill-fated woman?
• Opened the box and/or with her father around
• Woman given box containing one or two of Pa's letters
• The first Greek woman to criticize another
• Line on artist whose opening was a disaster?
• Bear-like creature boxed men — girl boxed, too
• Ill-fated opener of myth