You fucking dumbasses. Isn't it obvious by now that Nunnally isn't Lelouche's sister? She's most likely a Geass child ( same as Rolo). It's still debatable when she replaced Anya. But I know this: being blind means she couldn't have been geassed by Wakamoto, so she knows damn well that Lelouche isn't her brother. Jeez, she's the same as freaking Rolo, ultimately getting attached to a brother, even if he wasn't her real one. Damn.