One of the most interesting things in the game are character voicelines, especially the funnier ones like Teevee and 🪨 . Some also reflect on the lore/personality, like Skinny and Froggy. The best example of these are the ones when you click on them in the character tab
Except Chuck and Kat don't have those. I get why Chuck doesn't but he could at least have a stock quack sound effect pitched down. Kat just doesn't make much sense though, especially with her voice which is so different and cute compared to the rest of the cast.
Also, semi on topic, but I got jumpscared by 🪨 saying dick, which was pretty funny (they went all in on the potty mouth and it's wonderful).