We're less than a day in, so I might be premature in saying this, but so far my MVP is Mae. I made her a pseudo healer with breath of life and she was my MVP last Trial. This time around she's able to fill the same role but better thanks to the breath of life seal, is a bonus unit, and hard counters the Celica in the final map (takes 0 damage and can kill if Glacies is up).
I really like my Mae.