I died during Servant C's second phase, and when I respawned the memory disk was already there and Servant C wasn't. I put a house on the same screen if that helps.
Also, having the secret that leads into the castle be on the same space as a spike is a VERY BAD IDEA. It's possible to open and enter the secret without having the kitten, by using the stop sign and mouse to stand on the very edge of the block. Then, it's impossible to get back out if you haven't opened the castle's main door.