I have a theory regarding to the active and passive status of muses and lords. My theory is that Muse is active and Lord is passive.

Yes, im aware callie claims muse is the most passive and lord is the most active and i will address that in a bit but first hear my evidence.

Lord english used manipulation and influence of several characters to create himself. Doc scratch, the felt, the midnight crew, cal and everyone cal influenced  were all to ensure his creation in the first place. The alpha timeline is tied to his existence. He didnt do anything himself to create himself, he used everyone from the beforan trolls to the alpha kids to even his younger self. To me it seems like some very passive feats. Even as a brat he was only ever told dirk to do something in regards to his future once and that was to bring cal to the roof.  Other than that he just had dirk draw for him and taunt the other kids. nothing involving the game. 

Now muse callie, we only ever saw do one thing. destroy the green sun and in turn destabalize the whole of paradox space. And the callie who is currently alive made several attempts at inserting herself into the narrative of the alpha kids. she would regularly reference the game prior to them playing. It feels like active things to do.

Now why callie says muse is passive and lord is active despite this theory claiming its the other way around, theres two possibilities. 

1; The book callie has that mentions the active and passive nature of the muse and lord are basing its description off of what she said about the classes. She said what she said because of what the book said. So its misinformation spread through a stable time loop. most likely reason.

2; callie is in denial about her active nature due to prejudices against active players. when she explained the prince role to dirk it seemed like she doesnt trust active classes as much as she trusts passive. shes a cherub and cherubs see everything in black and white so its possible that she feels that active classes are more unstable and she lied because she doesnt want to face the fact that things are often grey. Its not as likely but it would be a valid reason.