Semiotic mediation has recourse to a more advanced technology which leads humans to form a new aspect of life causing the human and technology to become intermingled. As many media theorists indicate, new media with complexity attempts to disguise the nature of technology, resulting in reflecting the very nature of human, closely imitating human in mind and body. This makes us ponder on who we are as humans and what kind of mediational tools we use. In this paper, I will examine three kinds of mediation which are consciousness, social organization, and technology so as to discover self identity in the digital era. I will specifically look into narrative mediation for consciousness activity for human development according to the two intertwined domains of phylogeny and ontogeny. The idea of development in the two directions is apparent in the digital culture in that an individual should not be confined to a subjective world; rather, an individual functions as the representation of universal characters as human beings. Then, how is this individual being defined as in-between character both in private and in public. I suggest a self-portrait as an autobiographical writing describing self identities in the three domains: the personal self in description in reality, the virtual self in a narrated world from the past, and the expressive self as in thought activity for the future. These three selves in an autobiographical writing in cyberspace will illuminate this point.