In terms of contributors to the story and gameplay, it was just a six person dev team, but we had quite a few voice actors, yes!
As Chris said, for a team of mostly new developers, everybody was surprisingly hard-working and reliable and we all wore a lot of hats with little to no miscommunication. (And on top of that, our VAs were very accommodating even when our deadline was fast approaching).
I came in as a secondary writer about halfway through the jam, but as far as I understand, everyone was following one preset, central narrative that drove every element of the game. In hindsight, I think it was the late stage attempt to stay true to the original scope of things that contributed to that stylistic dissonance you mentioned. I appreciate your valid critique though! It's given me a lot to think about regarding production and writing :)