What does classical mean?
a. stands out because of being remarkable
b. the ideal in terms of which something can be judged
c. having to do with the ancient greeks or romans

Gertrude is Hamlet’s mother and the  Queen of Denmark. She was married to the murdered King Hamlet who is (represented by the Ghost in the play) and has subsequently wed Claudius, his brother. Her close relationships to the central male characters mean that she is a key figure within the narrative. Hope it helps!