You just witnessed a demon's gruesome death

The scene was quite disturbing, you stepped back, feeling a bit light headed. Yushiro placed his hand on your shoulder

All of you went inside, Yushiro kept you stable as you went to sit down on the ground. Lady Tamayo went to speak with Nezuko and Tanjiro in the other room, leaving you with Yushiro. "If you're going to be a demon slayer then you need to stand the sight of blood"