A Guardian Spirit is the attendant spirit of a person: present, not always seen. Shri Gurudev Mahendranath also called it the Umbra. He refused the word angel, which carries another religion’s furniture.
Within the International Nath Order everyone is taken to have one. Contact is experimental work in the zonule—the Umbra Zonule of The Londinium Temple Strain. Childhood often had the link; adult Konditioning covers it. The Guardian Spirit is not the Cosmic Spirit, not a cryptonym, and not a purchased guide. This page names the attendant. The Scroll teaches the sitting.