I don't know if this will suite your palate or does a good enough job but this story series I've been reading is excellent and is focused on Ignis and Gladio relationship. Both their hardships when he is blind and all that. Sadly, there's no scene of on Chapter 13 specifically but more of the time revolving around when Ignis got blind and the post ending of the game. Anyways I still hope you would like it.
The story link: https://archiveofourown.org/series/606031
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timeasmymeasure
Re: Gladio/Ignis, Trying to get through Chapter 13
Date: 2017-03-08 09:31 am (UTC)The story link:
https://archiveofourown.org/series/606031