OK, the deal with the two accents... that was supposed to make Reeve and Cait Sith distinct from one another. There's that one time where Reeve's talking to Scarlet and Heidegger; Scarlet laughs at him for speaking strangely. Basically, Reeve was getting a bit frantic and accidentally used his 'Cait Sith voice' with his colleauges. This is supposed to be the scene which confirms for AVALANCHE that Cait Sith and Reeve are actually one and the same.

It lost a bit in the translation, though. 'Kishi knows the full story.