I married Lissa, primarily because I had accidentally raised my support level with Tharja to A and I really really wanted to get away from her. I didn't know that this would cause Morgan to start out as a healer. Completely unable to defend herself. Surrounded by enemies. On the opposite side of a cliff.
I didn't realize this at first, and she died on the first turn. Okay, what the fuck, I told myself. After 5 minutes of staring at the preparation screen I attempted to pull a trick where I would use Cordelia and Sumia to carry Lon'qu and Chrom to the other side of the cliff and protect her, but I couldn't move people in such a way that they could get all the way across the gap and position themselves just right to be able to wall the enemies away from her. I kept trying and trying in the hopes that the enemies would attack one of my units instead of charging straight into her, but it didn't work. On the hundredth try, Morgan was finally able to dodge one of the attacks and then activate Miracle on the second attack in order to not die.
She still died 99 times before she was able to live, so it goes here.
Fire Emblem Awakening.
FAKE EDIT: Also, I'm going to buy FE Fates: Conquest. I've heard it's wicked hard, so I decided to rise to the challenge, but I'm still going to preemptively mention it here.