EXPLAINATION
From now on, there are going to be a lot of characters in this story. The complications would mostly come from the Symphonians and their counter-parts. So I just made up this little explanation just to make it easier on everyone. People from the Great Sea will be referred to by their last names. People from the world of Symphonia will be referred as they would be in the game. Here's are the differences:
In Symphonia: Lloyd
In the Great Sea: Irving or Lord Irving
In Symphonia: Colette
In the Great Sea: Brunel or Lady Brunel
In Symphonia: Zelos
In the Great Sea: Wilder or Governor Wilder
In Symphonia: Regal
In the Great Sea: Bryant or Captain Bryant
In Symphonia: Presea
In the Great Sea: Ms. Combatir
In Symphonia: Kratos
In the Great Sea: Aurion or Lord Kratos
In Symphonia: Sheena
In the Great Sea: Fujibayashi or Professor Fujibayashi
The only complications are Raine and Genis Sage. If I used their last names; it would apply to either Raine or Genis. The only way to remedy this is to give them corny titles. The Raine from Sylvarant will be known as Professor Raine, and the Genis from the Great Sea will be Professor Genis. The Raine from the Great Sea will be little Raine and the Genis from Sylvarant will be Little Genis.
I hope that you will find this document useful and will continue to refer to it throughout the story.