No, no. A "Mary Sue" is the original term for a self insert character. Actually it's a derogatory term. Because it refers to the very worst abuses of SI characters. You never never want to refer to a character as a "Mary Sue" unless it's meant as an insult.

-Logan

	I would enter your sleep if I could, and guard you there, and slay the thing that hounds you as I would if it had the courage to face me in fair daylight. But I cannot come in unless you dream of me. --Prince Lir, The Last Unicorn