I already beat the game on Normal/Classic. The game is pretty challenging. I am replaying the story on hard and the enemies don't mess around.
On my first file, I had Kellam married to Miriel. I recruited their kid later, Laurent the mage. I also had Lissa marry Libra and recruited their kid Owain the mymrdon. Chrom to Sully and I got Kejelle the knight.
In my new file, I had Chrom marry my female tactician. (Yeah, I chose the female gender in my current file for Hard/Casual). I didn'teven know that was possible, but I did recruit their son, Morgan the tactician.