Mirabelle died protecting the students and instructors of the college from
Ancano
Ancano is an Altmer mage at the College of Winterhold. He is a Thalmor operative, serving as an advisor to Arch-Mage Savos Aren and is the primary antagonist of the College of Winterhold questline.
› wiki › Ancano_(Skyrim)
Why does Mirabelle Ervine die?
The Staff of Magnus
When the Dragonborn returns from Labyrinthian with the Staff in hand, they can ask where Mirabelle is, and Tolfdir will reply that she sacrificed herself to get the others to safety, and out of Ancano's reach.
Can you marry Mirabelle in Skyrim?
You can't . "Marriage" on Fandom: "Marriage is a gameplay element in The Elder Scrolls V: Skyrim.
