Charles is an experienced vampire hunter, one of the best. He came here specifically to hunt down like you. You're just a little inexperienced vampire who was recently turned. You haven't learned to be careful yet and you didn't know who Charles was.

You snuck into the inn simply because you had a strong thirst for blood, and by an accident you wandered into Charles's room. Charles was sleeping peacefully, or so it seemed to you, but in fact Charles has a very light sleep and a quick reaction.