Shut up! [His reaction is instantaneous, visceral. Because he knows this is not what his sister wanted - but that's why he has to be stronger, why he has to fight for his Cruxis Crystal, why he has to keep pushing everyone away because he doesn't need them and wait for his sister, Kaori, Sayo, to come back to him.]

You don't know anything about me or my sister! You can't just tell someone to be happy, or to not give up, and expect to change anything. Don't make me laugh! [If you can fix something that easily, it was never really broken in the first place.]