NIA HAD 7 real "collection" of warriors that she hid from Aku.
All this time, her brother thought that she had a private army with more than a hundred of men. Well, that was true. She also had a collection of weak warriors that she only considered as "minions." In short, paws that she could discard anytime.
Some of them were Lord Eugene Huxley and Lady Alisa Hayward. She only needed the count for his money, while she needed Alisa for her healing abilities.
Come to think of it, the only real followers of her that her brother had already met were Lahara and the Royal Archmage. Yes, the White Tower and the royal mages were under her control.
Always has been.