Dorje Sempa

Vajrasattva (Sanskrit: वज्रसत्त्व, Tibetan: རྡོ་རྗེ་སེམས་དཔའ། Dorje Sempa, short form is རྡོར་སེམས། Dorsem, Монгол: Доржсэмбэ) is a bodhisattva in the Mahayana, Mantrayana/Vajrayana Buddhist traditions. In the Japanese Vajrayana school of Buddhism, Shingon, Vajrasattva is the esoteric aspect of the bodhisattva Samantabhadra and is commonly associated with the student practitioner who through the master's teachings, attains an ever-enriching subtle and rarefied grounding in their esoteric practice. In Tibetan Buddhism Vajrasattva is associated with the sambhogakāya and purification practice.

Vajrasattva appears principally in two Buddhists texts: the Mahavairocana Sutra and the Vajrasekhara Sutra. In the Diamond Realm Mandala, Vajrasattva sits to the East near Akshobhya Buddha.

In some esoteric lineages, Nagarjuna was said to have met Vajrasattva in an iron tower in South India, and was taught tantra, thus transmitting the esoteric teachings to more historical figures.

Mantra = । ॐ वज्रसत्त्व हूं॥ oṁ vajrasattva hūṁ

Vajrasattva' (Standard Tibetan: Dorje Sempa, short form dorsem, Japanese: Kongōsatta, Chinese: 金剛薩埵 Jīn gāng sà duǒ) is a bodhisattva in the Mahayana and Vajrayana buddhist traditions. Vajrasattva's name translates to Diamond Being or Thunderbolt Being, or, more appropriately considering that the term "vajra" often functions as a marker for tantric Buddhism, the Tantric Buddhist Being.

...
Wikipedia