Glimmer was so impacted by her mother's death that she insisted on the most damaging amount of actions possible, to damage the Horde, even if it means to demolish them beyond what is questionably moral.

What episode does glimmers mom die?

In the final episode of season 3, before Angella sacrifices herself to save everyone, she tells Adora that she is a coward, and is seen hugging her and kissing her forehead before leaving, and asking her to take care of each other, referencing to Glimmer and her friends.

Who does Perfuma end up with?

Perfuma is currently in a relationship with Scorpia.