margin-dweller

one who dwells in the margins of society, often neglected and not well understood by the majority; sometimes speaks with prophetic insight to those from whom he or she is alienated; in anthropology, sub-cultures that survive outside of majority social norms (for example, forest dwellers)

"In contrast to the interpretations of Western commentators, the “margin-dweller” of Upanishadic criticism, Grinshpon argues that the metaphysical philosophy of the Upanishads cannot be reduced to “contents” and studied without consideration of the lives and experiences (or contexts) of Upanishadic characters if we want to understand the full import of early Indian religious literature."