After her experience in Virtual Reality, Nishinosono remembers that Saikawa was with her after her parents death.  The lab attempts to reset the non-functioning Red Magic system, and as the lights go out Saikawa finds a clue.
F, huh?
إف؟
F also …
F, ¿eh?
F, ¿eh?
Un F, hein ?
"F", eh?
F, né?