The Final Showdown with Sin «

There are two lines in the final showdown with Sin that are altered by affection levels. You can see Kimahri and Yuna's responses at gamefaqs.com and FFWA. The first line is said after both fins have been blasted off, and that character is the first to jump off the ship into battle (I'll have the rest of that scene up eventually). The second is the last line of the conversation that takes place on the bridge before the final battle with Sin.