If there is one single female character that encapsulates all the qualities that make a woman influential in this story, it must be Lucie Manette. Intentionally so on Dickens's part Lucie is characterized as, from a 19th century perspective, the perfect woman. She's compassionate (O, so overwhelmingly compassionate!), she's beautiful, she's delicate, and she's loyal. These qualities allow her (as so eloquently stated by said male characters) to exercise an uncanny efficaciousness over the gender so hormonally inclined to bend to a damsel's whim.
Through her interactions with the other male (and female) characters we learn infinitely more about them than we ever could otherwise. A perfect example of this is when Mr. Stryver asks Lucie for her hand in marriage. Stryver had always carried himself with an air of arrogance and rigorous self-satisfaction. However, after he falls in love with and is subsequently (and ever so politely) refused by the Manette family (vicariously through Mr. Lorry), he