Freya was more of a novelty as a party member than anything else, with all those absurd "When the hell am I gonna need these?" abilities, much like Amarant. That just made them more fun to use.

Frankly, after the whole thing with Fratley forgetting his past, I sorta liked the allusion to, not so much love, but more of a deep mutual respect as honorable soldiers between her and Amarant. Seeing them being forced to work together in the Fire Shrine (and going from "Why must I?" to "Let's rock!" after an insightful speech) was a pretty heartwarming moment, no pun intended.