I don't mind the South Americans. They're far from my favourite characters, but I don't hold too much of a grudge against them or anything. Alejandros gonna die soon anyway I reckon.
I like Hiro being back in ancient Japan, thats really cool. Could get stale after a while, but I can't wait to see him re-unite with Ando! Takesho Kensei is a good character. He's funny, but his power is even more interesting. While Claire's power is rapid cell generation thingy, I reckon his is immortality. So, I reckon he's still alive, and is the guy who killed Hiro's Dad and attacked Angela. He's also the person who "sees" Molly.