Thank you for the Nah insight, that make's sense to give her merc and armthrift for Dragonstone+ OR Braveaxe if you pass down Axefaire, either good for enemy turn defender.
Looking over Fredrick!Gerome, getting access to Dual Guard+, Pavise, Aegis, Deliverer with possible pass down of Dual Support+ from Cherche, maybe the idea is a physical pair-up Gerome? He can't get Galeforce anyways. The -Spd reinforces the idea that this Gerome isn't player turn, so slap on him a braveweapon for the swing and tank hits for your physical Galeforce, (maybe good Lucina Pair up to transport her around and tank hits while giving her great bonuses). Again, just brainstorming what the pair was for to this Gerome, looks like just a worse Stahl!Gerome.