So I've decided to read even further into this story. You know, I never noticed this was a short story collection, but now I know, the formatting makes so much more sense to me!
As you said in your author response, it is looking like Salazar's is the darkest of these founders' stories. In thinking of that, I see the deeper meaning to your story's title. At first, I thought "Four Flip Sides" referred to the founders' conflicting personalities, but they were still bonded together, like the heads and tails of coins. However, now I see that you might have meant to give a hint that you were showing the other side of each of these Founders, the side the characters in the stories we read, characters that came centuries after these founders and regarded them highly, never saw. (Was that sentence comprehensible?)
You wrote Godric well, showing that no one is ever brave through and through. This line, "For the first time, Godric found himself thanking the heavens that he'd experienced death." really emphasised that.
"Even Godric, the most accomplished of duelers, couldn't battle with just the idea of an enemy crouched in a tree. " This line really just gives a deeper insight on fear, and how you can't banish it from within you. The point of me mentioning that is just that it's really brilliant.
I was a little confused at the mention of three light sources, and then I thought about it a bit and remembered the lantern. I'm not sure if it wasn't clear enough or if I'm just not observant.
The encounter with the centaurs shows the rift between wizards and centaurs, and how it dates to way back when. It was a nice touch, like how Salazar charmed the girls' staircases.
Overall, a deeper look into fear as well as some great description! Like all the chapters, it exposes some side of a founder we never really hear about.
I look forward to Helga's story!
Author's Response: Haha, my original intent was for it to be about the sides of the Founders we don't see often. And your sentence was perfectly comprehensible. I do also like your original interpretation, however. I think these stories can also show the conflicting personalities of the Founders.
I'm glad you liked that line! I'll admit I was thinking along the lines of "the only thing we have to fear is fear itself" for that one, along with Dumbledore's descriptions of Voldemort. I think in HBP, when he and Harry were in the cave, he talked about how Voldemort feared death because he feared the unknown.
I'll take a second look at the "light sources" reference. That probably came about because of my word count restrictions. ;)
I'm glad you liked the centaurs! I was originally going to have Godric all alone the entire story, but then realized not everyone likes to read 600-something words about walking in a forest. :P So I added in that bit. Since there seems to be so much bad blood between the races in Harry's time, I wanted to show some of the animosity even earlier on.
Thanks for these detailed reviews! They're so refreshing, and balanced well as opposed to gushing or critical.