Frank and Chuck, clearly. Look at the panic written on their faces as they contemplate the futility of escape from the flesh-eating fiend known as Miyako Yoshika.
Everyone is a "foreigner" to the japanese... even when they're at their home country.
AfterwordAfter being independent from Kaku Seiga, Yoshika flew to America on her own and met an "outbreak".
And because she was so hungry, she assaulted and tried to eat two nearby foreigners, Frank and Chuck.