That's what I've been taught. It doesn't make sense, I know.
[...It actually does make sense, but Vaan doesn't know the truth.]
But it's my duty to kill them. Though - with this here, I don't know what'll happen to Gran Pulse - I mean, those guys already shattered their other crystal. [Now he's just musing to himself, as he dries his cape proper - the pendant... all that is left of Reks (so he thinks)... it's nice and dry.] Maybe they'll finally die off?