This game turned out great! I liked the art a lot since I first saw the initial designs and it looks amazing all put together. Tbh I can't pick my favorite character design, they're all so good! I liked the backgrounds too, especially the kitchen one (WOW that warm color palette).
I also appreciated that you had a protagonist with they/them pronouns! The conversation with the heir of Berde in the banquet hall was also very nice to see ;___; I enjoyed the interactions with the heirs in general too, I feel like you did a great job of writing them. They had a good balance of seeming like nice kids who like you but also being potentially dangerous since they do have a lot of power as heirs to the throne. I liked Diskarte's attempt to help the heirs see through the propaganda they're exposed to as well.
I played through the game a bunch of times trying to get all the endings (it took me a while but I eventually did it!). I can't decide which of the two romance routes was my favorite ending, they were both great. I just want Diskarte to get out of this situation and be happy! So I think Diskarte was my favorite character overall haha. I liked Yugto a lot too, I didn't pay as much attention to him earlier since I wasn't sure what his role in the story would be, but I ended up really enjoying all the interactions with him.
Again great job, and congrats on finishing NaNoRenO!