Within looking at my sources my immediate answer is the eight consciousness or storehouse consciousness. As explained by in Yogacara there are the five senses, the six one being thought or the mind, the seventh one being the formation of the self or I, and the eighth one being were karmic seeds are planted and continue in the mind stream. In my understanding it is therefore only these positive or negative seeds along with causes and conditions that interdependently move forward. It isn’t me in any sense of the term as we imagine it.

Here a good link: en.wikipedia.org/wiki/Eight_Consciousnesses#China