Well we dont know until what point we have the tadpole in our mind. Maybe it will be removed at the end of chapter 2 or at the start of chapter 3. Maybe its in our heads the entire game. Who knows honeslty other then Larian?
It will be there for the entire game. I am willing to bet on it. It is the Source from D:OS2. It is an equavalent of being a Child of Bhaal. It is one constant between all origins and custom character.
