ORIGINALLY PUBLISHED IN JANUARY 2015

Woman Survivor: Big Hero 6
Forgotten Disney Character

So here we have a women who is a presumably a professor at the nerd school.

A fire breaks loose at the school and the brothers immediately rush to the action. While most civilians manage to escape, Tadashi learns from a survivor that Callaghan is still trapped inside the burning building. With no help around to save him, Tadashi volunteers his own life.

"Yeah. I'm okay.
But Professor Callaghan is still in there."

Even though she's never seen again, we can assume she's alive at back to her old life.

Source: DisneyWiki

November-26-2019 Update: Updated and changed chapter with added information. Original title: "The women from Big Hero 6."