Complex sentence: The dakini, in various guises, serves as each of the Three Roots, and may be a human guru, a vajra master who transmits the Vajrayana teachings to her disciples and joins them in samaya commitments.
Split into simpler sentences: The dakini, in her various guises, serves as each of the Three Roots. She may be a human guru, a vajra master who transmits the Vajrayana teachings to her disciples and joins them in samaya commitments.