“Ekajati is the principal guardian of the Dzogchen teachings. Enlightened from the very beginning, Ekajati is a direct emanation of primordial wisdom, Samantabhadri, who is the feminine aspect of the primordial Buddha Samantabhadra. As the primordially enlightened one, Samantabhadri, Ekajati has all-knowing wisdom regarding the teachings of Dzogchen. Ekajati visibly manifests in a particularly wrathful form in order to subjugate the very powerful and potentially destructive class of beings called ‘mamo.’ “Ekajati” means “one tuft of hair,” which is symbolic of wisdom. What is unique about her phusical form is that she is one-eyed, one-toothed, and one-breasted. These features symbolize non-dual awareness. As chief protectress of the Dzogchen teachings, she may make contact with a terton of Dzogchen master when the time is ripe to reveal a certain teaching, or terma. Chogyal Namkhai Norbu received an invocation from Ekajati as part as a Gongter of the Mandarava practice. The sadhana is an invocation within which the practitioner asks that Mandarava clear all obstacles to total realization and provide protection on the path.”
~ from “Dream Yoga” by Chogyal Namkhai Norbu Rinpoche
There is a fascinating account in this book, pages 113-130, wherein Chogyal Namkha Norbu recounts a visionary dream in which Ekajati appeared and assisted in bestowing empowerment during a terma revelation.
Ekajati thangka by Dawn Lhamo.