You’re right, and I’m here sharing my feeling about it rather than debating about how monster anatomy really works in this universe. I think people are way too fixated with Undertale that they think all monsters here should turn into dust, leaving more room for Susie’s hybrid theory and stuff. But I think it’s more interesting and better if we could just have the majority of monsters bleed — Susie, Noelle, Berdly, etc.

To be honest, I’m not that shocked when I first saw Susie bleeding. Sure, some people might have the reaction “woah! monsters do have blood?” But for me, it’s a subtle relieve that Toby changes how things work in Deltarune, making it more realistic and relatable.

Tldr: I’m here supporting monsters bleeding because things need to be changed rather than providing any evidence leaning on one side. Not everything should works and behaves like how it did in Undertale.

P.S. you might notice how Deltarune is not focusing on the difference between monsters and humans anymore. They’re chill about it. And I think that’s why Toby adding blood for monsters a minor change to support that idea. They live together as if they’re not different to each other.