Charlie or Mari is Henry's daughter and the apprentice of The Voice. She helps The Voice with lost souls but eventually sets off to be with her own kid. 

She has some secrets regarding who the kid is that she protects. I will tell you about that if you get the role. Secrets shall be kept. 

Then ??? is an unknown character. Both Mari and ???'s voices sound the same, so we need the same voice actor. ??? is whispering.