At the end of the final chapter, just before the good end, whoever you chose as the protagonist will have a small exchange with Oersted. Since playing through the chapter to see them all is rather inconvenient, I thought I'd compile them all. (the translation used is the Aeon Genesis 2.0 patch)

Timestamps:
0:00 - Oboro
0:36 - Sundown
1:07 - Cube
1:23 - Pogo
1:48 - Masaru
2:22 - Akira
2:56 - Li
3:35 - Yuan
3:58 - Sammo

I also made a similar video for the protagonist lines in the bad ending:
   • Live A Live (Final Chapter) - All uni...  

If you're curious about all the protagonist's unique responses to Oersted's question of "what is the reason for your fight?" (just before the final boss fight), look at my first response to the pinned comment in this video's comment section.