Dr. Marjorie Harrington, née Quintrell, was a Manticoran citizen and a member of the Harrington Clan.

Her treecat name was 'Plant minder'.

Her eyes were hazel-brown. (SK3)

She and her husband Richard migrated to Sphinx with their daughter, Stephanie, thus founding the Clan. She was employed as a botanic geneticist and biologist, and encouraged her daughter to solve the "Great Disappearing Celery Mystery", thereby leading to the discovery of treecats and her daughters' adoption by one of them. (HHA1.1: ABF)