I never fell into the undead purgatory with the chariot guy. I guess if you kill all the dragons on the way to the long bridge nothing happens. I was fully expecting to fall to my death though lol. Maybe I will purposefully not kill everything next time haha. I'm sure I missed some things. Also, Queen Mytha was in love with her husband, but he apparently started to lose interest in her. She somehow began to use poison to try to improve her looks and try and win him back. But it didn't end well and she eventually became that thing. That's what you hear when you talk to the laddersmith before the boss fight. Also, I wore the ring that lets you hear the inner thoughts of your enemies before walking up to the knight at the bastille, and I believe you're right. You can here him kind of just growling and muttering something unintelligible. I assume he's trying to fight the last stages of hollowing but it's not working out for him. It could very well also be three separate knights who all face the same fate. Perhaps they were placed there as guards and the only thing keeping them from going completely hollow is their duty to the king.