I thought she was a decently cool character, though at the end, we were enemies on different sides.
At the start of my route, we meet her as a loyal knight of the Church of Seiros. Her unique sword Thunderbrand steals the show for a few moments.
She helped me out during a battle against some lord rebelling against the Church of Seiros.
When I side with Lady Edelgard against Archbishop Rhea, she obviously takes Rhea’s side.
And she was the most powerful of Rhea’s allies during my last battle. Only by sheer luck did I manage to win that one.