Hi Jensters2, I'm glad you enjoyed the story so far! I wonder when you mentioned learning about a new characer, have you found Simon and Anthony's routes yet? Just in case you haven't here are hints:
To start Simon's route, don't sit quietly and leave the closet during the castle attack in chapter 3. Follow the sound of the battle at the front gate and keep watching it unfold. When Isaac is distracted, try to make a run for it to escape the castle. The MC will later find parts of Simon. Help him and then follow him to his house.
To start on Anthony's route, take a walk in the courtyard at the beginning of chapter 3. The MC will notice overgrown vines. Later in chapter 3, when Nate locks the MC in the closet during the attack, break free of it and choose to go back to the courtyard. Anthony will help the MC to escape the castle.