So, I've been playing for a while trying to figure out what I need to get into Ravel's maze. As it turns out, I need to get a key to get into a my room in the Civic Festhall. Only problem is, I don't have the key, and I'm not a sensate anymore, I became a godsman, and if I did have the key at some point, it's now lost. What do I do? I have the handkerchief, but I need the dodecahedron to finish the game, don't I?

I'm pretty sure you don't need the dodecahedron to finish the game.

You can convince someone that you used to be a sensate long ago to get into your room and the other sensory stones without actually joining the sensates. Can't remember if it's the guy who you talk to to get sent to the stones areas or not though, sorry.

It is. Guy's name is Splinter. Just talk to him and choose the option "What can you do for me?" (or something to that effect). Then choose to tell him you used to belong to the Sensates.