a person who associates or cooperates with another; supporter. As used in Scientology, ally means someone who protects a person who is in a weak state and becomes a very strong influence over the person. The weaker person, such as a child, even partakes of the characteristics of the ally, so that one may find that a person who has, for instance, a bad leg, has it because a protector or ally in his youth had a bad leg. The word is from French and Latin and means to bind together. —Dianetics 55! Glossary (app 9.7.90)