Kinkara are special Dharma Protectors for practitioners of Heruka and Vajrayogini. They are emanations of Heruka and Vajrayogini who emanate as skeletons.
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Kinkara – Buddhist Deity
In Vajrayogini practice, we are supposed to visualize our Guru as Vajradharma, who is the manifestation of the speech of all the Buddhas. He has a red coloured body, one face, and two hands, which are crossed at his heart and hold a vajra and bell. He is the same nature as Conqueror Vajradhara and looks exactly like him, except that he is red and adorned with six bone ornaments, whereas Buddha Vajradhara is blue and wears jewelled ornaments.
Read More From Kadampa.org: Buddha Vajradharma