With the exception of the weekend, it seems, the Japanese Fire Emblem Twitter has been posting daily about Fire Emblem Engage. Some of the info is stuff from the reveal trailer, but there’s some new stuff scattered around too.
First up is a short clip showing Alear in battle, performing a critical hit.
This seems to occur in the very first map (not counting a potential Premonition map), since Alear is Level 1 and the Dragon Guardian twins haven’t joined your party yet (currently they’re NPCs).
Interestingly, the Forest tile provides 30 Avoid.
The foes on the map are the Corrupted, although they’re labelled as ??? because presumably Alear doesn’t know what they are yet. At this point, Alear hasn’t summoned Marth yet.
The above screenshots from the reveal trailer, I believe are from the same map. I think the map will end with Alear reuniting with the twins. But then they become surrounded by the Corrupted and Alear summons Marth to deal with them.
Next is a bunch of info for Vander, the older Dragon Guardian.
Vander (VA Yōji Ueda) is a 32nd generation “Dragon Guardian”, protectors of the Divine Dragon at the Land of Lythos. Cared for Alear who was asleep for ages and a reliable ally who’s sworn loyalty to Alear. Very serious and strict; the guardians’ mission is at the forefront of his mind.