I only know a bit about Ringabell so far, I assume he had like a dark /crazy past from what I've read in his diary. Don't you dare spoil it though. I shipped Agnes and Tiz already. Edea is cool, her voice bugs me though.
So how many hours of game play should I expect?
I ship Ringabel/Edea rock hard. You'll find out why later on if you keep playing, I won't spoil anything. I am riding around 64 hours of game play atm, and I haven't even beaten the game yet, still playing, still getting new stuff. For a DS game it's pretty heavy in content.