River

There's actually a couple lines that the writer stole from the book. I can't remember the lines anymore but it was during his stay at the hospital (the beginning). EDIT: Stole this from tvtropes: Early on, Hisao says that when they heard about his arrhythmia, his parents "practically had two hemorrhages apiece," a reference to The Catcher in the Rye, in which Holden says something similar about his parents in the first chapter. - Hisao also says "phony" a couple of times during Rin's path.