Passage: When Charlie learns that his estranged father has died, he and his girlfriend Susanna travel to Cincinnati, Ohio, in order to settle the estate. He learns he is receiving the classic 1949 Buick Roadmaster convertible which he and his father fought over, but the bulk of the $3 million estate is going to an unnamed trustee. Through social engineering, he learns the money is being directed to a mental institution, where he meets his elder brother, Raymond Babbitt, of whom he was previously unaware.

Question: Who is Charlie's girlfriend?
Susanna