I played fe7 as a kid, and only played fe6 when I was older. The fact that you can’t do anything about the fate of the fe7 lords in fe6 was so painful. It felt like you really fail them as a friend and that keeping their kids alive and getting them to their happy endings felt like a personal promise and an apology to old friends.
Here’s my version of Mark / the Tactician from FE7.
I know that the devs were just having fun and that there’s no way Morgan from Awakening being Mark from FE7 is ever going to be canon, but it IS a fun idea to just play around with