Hiro's Dad dresses that well
Not that Claire looks half Japanese...
SPOILER but only public info: (highlight)
Hiro's dad has at least one more episode. One in which he talks with HRG, who apparently also knows Japanese.
The word was that 2 characters would die. Now assuming the doctor/Claire's fake bio-dad wasn't one of them we still have 2 Hero deaths coming.
Linderman has been cast and isn't anyone we've seen on the show so far.
He will be played by Malcolm Mcdowell
END SPOILER SPACE