Who is Tinidril the Queen, The Green Lady from Perelandra and what is their importance?

Tinidril the Queen (Green Lady) is the mother of all mankind. She parallels Eve in the Biblical account. Unlike Eve, however, she never succumbs to temptation and remains pure for the King. The Un-Man leaves her and battles Ransom instead. Ransom is the object of his battle from the beginning, but he chooses to attempt to gain victory by conquering the Queen, a feat that proves unsuccessful. Tinigril is initially described as naïve and innocent. Yet, she has a wisdom that guides her throughout, and thwarts the Un-Man's power over her. It is her refusal to engage that forces him to battle Ransom, which is the purpose from the beginning. In her wisdom and resistance, Tinidril helps shape the destiny of mankind.