Bhairavi is a fierce and terrifying aspect of the Devi virtually indistinguishable from Kali except for her particular identification as the consort of the Bhairava.
"O mind think day and night of the one with a frightening face. Mother is as beautiful as a sky full of dark clouds. She is naked, and her hair is wild. O mind you do not realize she dances in the sahasrara and muladhara [chakras]. She is in a state of bliss, like a swan moving through a lake of lotuses. Place this blissful mother in your heart and joyfully light the fire of wisdom to look deeply into her infinite beauty. Prasad says, she loves to fulfill the desires of her devotees. Tell me, what virtue can Nirvana [liberation] have compared with her love?"
-Ramprasad Sen