Yeah, the franchise is pretty fun for silly action games where you mow down dozens of guys. The Fire Emblem: Three Houses spinoff one (Fire Emblem Warriors: Three Hopes) is pretty fun if you haven't already played it.
Yeah, Three Hopes is excellent. I only did one route, Scarlet Blaze, and really liked it since it fleshed out Edelgard better compared to Crimson Flower in Three Houses. Shez was an awesome protag and fit in with the cast. Had fun playing as Shez, Petra, and Edelgard. I wish it got a DLC expansion like the other Warriors games, but they just moved on unfortunately.
For at least a little while I think it was "canon" that her body changed when she turned in to shiek, and then nintendo re-gonned it because they're cowards.