A hearty resistance fighter from Cheve. Born to a family of knights, but organized a resistance when she couldn't tolerate Nohrian oppression any longer. Likes shiny things more than anyone else.
Scarlet is a solid unit even though she comes prepromoted. High Strength coupled with high Speed allow her to hit hard and fast. She has low Skill, which can be a problem coupled with the inaccurate nature of Axes and Clubs, and she's a bit squishy, but she is more than capable of crushing the enemy before even taking a hit.
Unlike Reina, Scarlet's narrow range of reclassing options (she, too, cannot support with anyone except the Avatar), is exactly what she needs to excel. Knight allows her to gain the Pavise skill, halving damage from most physical weapons to offset her low Defense. Outlaw doesn't help her as much, but Malig Knight gives her access to Trample , allowing her to deal +5 damage to foot units.
All this being said, Scarlet will permanently leave your party in Revelations after Chapter 18, and she doesn't join you until Chapter 16. Very disappointing. I recommend in Revelations that you refrain from investing resources into her.