You have all these rules, and you think they’ll save you
This is my favorite part of Auron’s ending because of the history between these two. Kimahri stepped in when Auron could not fulfill his promise to Braska and took Yuna from Bevelle and placed her in Besaid Island. However, he did so much more than he was asked. Kimahri stayed with Yuna, becoming her lifelong friend and guardian. If there was ever to be a beautiful farewell, it would be this one. That little bump on the chest was more than a goodbye, however; it was a thank you.
People change, for better or worse.