Stella turning into a monster by Chimera is awful and the Solaria guard attack their Princess without thinking and realising the monster is Stella is unforgiven.
I chose Daphne becoming a spirit because she lost all of her freedom and it separated her from Bloom and everything she loved for several years💔At least for Mirta, Stella and Faragonda, their curses were broken soon after they happened.
I actually really like all of these ha ha. I thought they were all really great within the narrative and facilitated growth for the characters. Mirta's had the least consequences in the end I guess so I went with that one.