Three-faced, ten-eyed, and eight-handed victorious Ushnishavijaya [Tibetan: གཙུག་གཏོར་རྣམ་རྒྱལ་མ།, - gtsug tor rnam rgyal ma] - this is how her name is translated - is an emanation of Vairochana Buddha. She is one of the three longevity deities in the Tibetan Buddhist pantheon, along with Amitayus and White Tara. So she is worshipped as the auspicious patroness of long life.
She is regarded as the guardian of the Buddha wisdom. Corresponding to her name she is said to have her seat in the cranial protuberance [ushnisha] of the Buddha. Populary she is offen called "the mother of all Buddhas". The left [blue] one of her three faces is wrathful. A small Buddha image on her upper right hand is a sure sign of recognition.