That's it. I'm killing myself.
Originally, You couldn't have a party of more than 4 when you reached this place, so I made the game let you leave the Pyramid if you had either Bamihi or Madu in your party. But now that you can find more than 3 characters, you may not get either of them when you're in the pyramid.
If you want to fix it now, head for an inn in the Dark Era and let one of your character, then inspect the pyramid and try to find Bamihi in a room in the 2nd floor.
After you get her, you'll be able to leave. If not, wait an hour and I'll upload a fixed version.
As for your comment about the characters being silent, well, that's something I can't work around. Sometimes, depending on which characters you have, some lines will be different, and some special events will open up (for instance, if you have either Mathias or Evelyn in your party while resting in Dao (a town of ArrRabtia), you'll be able to see special scenes for them.
About the skills, they get progressively stronger as your level in them increase. that skill that increases your agility by 51% for 2 turn will increase your agility by 100% eventually (I might consider making it two turns, though). You may lose a turn, and it may seem kinda useless, but it's enough if you need to do away with an enemy very fast. Same goes for the pitiful amount of stats reduction, eventually, you'll reduce the enemy's pdef by 5% with every hit. But you can't have that at the beginning.