Samantabhadra is regarded as Adi-Buddha and as first Dhyani - Bodhisattva
Among the ancient Northern Buddhist sects and the old translation schools, Samantabhadra is looked upon as Highest Intelligence, a primordial Buddha, or Adi-Buddha. He is figured seated with the legs locked; but unlike the other representations of Adi-Buddha, he has neither crown nor ornaments, and in his esoteric form is represented nude in blue color embracing his Shakti [consort] in white color.
An Adi-Buddha infinite, omniscient, self-existing, without beginning and without end, the source and originator of all things, who by virtue of five sorts of wisdom [jnana] and by the exercise of five meditations [dhyana] evolved five Dhyani Buddhas. When this Adi-Buddha is represented with his female energy, he is called Yogambara and the sakti Digambara [Jnanesvari].
Yogambara is one of the most popular Yidam deities of Nepalese Buddhists. Yogambara sits in Ardhaparyanka on the moon on a double lotus placed on a lion. Yogambara is blue in colour and is three faced. His principal face is blue, the right white and the left red. He is six armed, and carries the vajra and bell with his two principal hands. He embraces his prajna Jnandakini who is also blue in colour and is bedecked with snake ornaments. In the remaining two hands he holds the breast and the arrow and in the two hands in the left he holds the lotus bowl and bow. Called Agam Dyo in popular Nepali usage, Yogambara is closely associated with snake-worship and naga - practice.
According to the legend, it is said that the deity Yogambara and consort Jnanadakini manifested themselves in the form of Yaksha and Yakshani in Kamarupa in Assam and gave birth to their son Lord Karunamaya whose chariot festival is continuing even today in Patan city. It is said that during the bathing ceremony of Karunamaya, Jnanadakini his mother in Yaksha form, used to come to Lagankhel in Patan and observe the ceremony residing on a tree.