The Pawns are constructed using Pawn Data assets. Currently there is only 1 Pawn Data asset, but you can change that however you want.
Just search the C++ for places where it is used and see how it works. If you aren’t good with C++ then this is probably out of reach without building your own pawn spawn/init system.
Lyra 5.1 includes some changes to the pawn initialization system. See the Pawn Extension Component to see how it works. If you’re still working in Lyra 5.0, I recommend waiting to do this part of the project until after Lyra 5.1 releases, to save yourself some time.