In the book, Katherine Solomon ( Valorie Curry ) is not Peter Solomon's ( Eddie Izzard ) daughter but his sister.
Just like in the book, Inoue Sato is Japanese but the actress who played her (Sumalee Montano) is of Filipino and Thai descent. The book further describes Sato as extremely thin and emaciated, and with a voice so deep and raspy that she is easily mistaken for a man.