It's nothing crazy. I don't think there is a way to sort it to show all of the free picks I got, but the ones you can't see are Sully, Cain, Amelia, Soren. None of them have outstanding boon/bane outside of Cain being +ATK and Sully being +SPD. Shanna, Florina, Palla, and Barst are neutral. I'm training them all anyway just in case.
Yes, I picked him as my CYL unit. I debated about Lyn so I could clear content easier in the meantime, but I would rather have Ike because I like him more, especially with Greil's outfit.