Dorothea is easily my favorite character in Three Houses, and may be my absolute favorite across the entire FE franchise. Beyond just physical beauty, she's whip-smart, clever, has a heart of gold, and she's been through some of the worst of times and come out of it.
I tip my hat to Nintendo for making such an intricate songstress, and I make it a point to have F!Byleth marry her on just about every run.