My guess is that the memories of Guda and his character are overlapping. Their mind chooses actors (servants) to portray characters they are most similar to. So in the case of Morris, his violent disposition no doubt reminded the Master of Sir Mordred. If we assume this pattern to be consistent, then other characters will likely have similar aspects and/or backgrounds to the servants who portray them.
Take Moriar- Doctor Hawthorne as an example. What does our main character see in him? A shady man who’m he finds difficult to trust? Or perhaps an able mind of renowned intellect?
Furthermore if my hypothesis of memories overlapping holds true, that would indicate why ‘Juliet’ was immediately associated with Stheno. The memories the MC has are only somewhat being accessed by the Master of Chaldea.
Lastly I have my hunches on Aaron and Adamska, and their real relations. Just a hunch based on their actors, nothing truly conclusive. If I’m correct, then we’re in for a tale of tragic love and drama. We’ll have to wait for pieces to show themselves before discussing further however, no reason to jump to conclusions straight away.