For the headcannon thing, if it hasn't been asked yet, how about a Hogwarts AU
I’ll add a few more to the one I posted before :D
- Roy and Riza are both Animagi (unregistered and registered, respectively) who underwent the process of becoming one while enrolled at Hogwarts as students, all for a friend who would undergo a Metamorphosis. Roy takes on the form of a black wolf while Riza takes the form of a hawk. The latter has discovered that her form is quite convenient for keeping an eye on the Elric brothers.
- Edward excels in Defense Against the Dark Arts while Alphonse excels in Care of Magical Creatures.
- Winry has found that she is incredibly skilled in healing magic. She shadows the nurses in the hospital wing, mostly because Edward ends up there often.
- Both Ed and Al have seen and befriended a Thresthal…
- Headmaster Hohenheim mysteriously vanishes and Eugene Grumman, a well-respected wizard and grandfather of Riza Hawkeye, takes over as the Headmaster.