In Genesis 3:15, God prophesied that the Mother of the Messiah would be at emnity with the devil: "And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise they head, and thou shalt bruise his heel". Mary is forever on the same side as her redeeming Seed in the struggle against evil, sin and death.
Isaiah prophetically called the Messiah the "servant of the Lord". At the Annunciation, Mary called herself the "haidmaid of the Lord": "Behold the handmaid of the Lord; be it unto me according to thy word" (Luke 1:38). "Handmaid" is the feminine equivalent of servant. If the Messiah is the Lord's suffering Servant, then His Mother stands with Him as the Lord's faithful Handmaid, with a subordinate role to play in the Redemption of mankind.