The seer for the Dattatreya Vajra Kavacham is identified as 'Kirātarūpī Mahārudrṛṣiḥ'. This is inferred from the lines in the kavacham, as taken from the Himavath kanda of Sri Rudrayamala: asya śrīdattātrēya vajrakavacha stōtramantrasya, kirātarūpī mahārudrṛṣiḥ, anuṣṭup Chandaḥ, śrīdattātrēyō dē...