Okay, in the beginning of the movie, Sesshomaru's dad asks him what he wishes to protect, or does he have somthing to protect.
Then way later on in the movie, Sesshomaru gets a flash back of his dad saying that, and then a short little clip of Rin and Jaken saying "Sesshomaru-sama!" all happily. Then Sesshomaru yells "I protect NOONE!" and charges forward at the bad guy.
Submitted by Sayla