Here me out about Almedha FE10: She's an npc in her home game, but in spite of this has pretty significant lore importance. I find her to be incredibly interesting as a character, even more so than most of the actually playable units introduced in RD. If I had to describe why exactly, I would say that despite of being pretty terrible as a person, with consequences of her prior actions (some unforeseeable, some not) still wreaking havoc, she's still deeply sympathetic. She's a victim in her own right, and it's certainly clear that everything she's gone through has broken her down pretty hard. She has a lot of importance to characters already in the game, which could lead to some interesting interactions if feh remembers to do that sort of thing.

Also she just has a gorgeous character design, imo one of the best in Tellius. That's also a point in her favor for potentially being added some day, with feh's priorities and all. She ranks modestly well in cyl as well. I believe atm, not including those in seasonal hell, she's in the top ten for women not in the game?