
Quick answer — Yui Otagiri voices Frieda in If It's for My Daughter, I'd Even Defeat a Demon Lord, Key in In the Land of Leadale, Maria in By the Grace of the Gods 2 and 1 more characters.
Yui Otagiri voices Frieda (If It's for My Daughter, I'd Even Defeat a Demon Lord), Key (In the Land of Leadale), Maria (By the Grace of the Gods 2), Ayane (In Another World With My Smartphone).
Frieda is voiced in Japanese by Yui Otagiri.